Noninvasive Stress Testing Research Articles

Regional variations in the process of care for patients undergoing percutaneous coronary intervention in Japan

SummaryBackgroundMeasuring the quality of care has been central for improving the outcomes of patients undergoing percutaneous coronary intervention (PCI). This study described the performance rates and regional variations in quality metrics for PCI using a representative national Japanese registry.MethodsOverall, 760,854 patients across 714 institutions (2016–2018) were analysed. Quality metrics included preprocedural antiplatelet therapy use, door-to-balloon time ≤90 min for ST-elevation myocardial infarction, transradial approach, and preprocedural noninvasive stress testing for elective cases in 47 Japanese prefectures. Coronary computed tomography angiography (CCTA) and fractional flow reserve (FFR) were also evaluated. Factors associated with preprocedural testing rates were evaluated using multivariable linear regression.FindingsRates of preprocedural antiplatelet therapy use were high with low variations (96·4% [94·7–97·2%]), but there was still substantial room for improvement in the rates of door-to-balloon time (74·7% [71·2–78·9%]) and transradial approach use (70·9% [65·1–73·4%]). Rates of preprocedural noninvasive stress testing were low with substantial variation (36·6% [27·1–49·7%]). Additionally, we found substantial variations in CCTA (50·0% [39·5–55·1%]) and FFR measurement (15·7% [113·–18·3%]) rates. The number of scintigraphy scanners/ prefecture was associated with the performance of noninvasive stress testing (13·4% [95% CI, 2·45–24·4%] increase for every 1/100,000 population increase in scanners).InterpretationsWe observed substantial regional variation in the use of preprocedural testing, and its performance was directly related to nuclear-scanner availability. These findings suggest the need for targeted efforts in improving testing rates, whether by optimising resource allocation or additional education or feedback mechanisms.FundingThis study was funded by the Japan Society for the Promotion of Science (Grant Nos. 20H03915, 16H05215, 16KK0186, and 20K22883) and by the Ministry of Health, Labor and Welfare Grants-in-Aid for Scientific Research Program (Grant No. 21FA1015). The J-PCI registry is led and supported by the Japanese Association of Cardiovascular Intervention and Therapeutics.

Challenges in Diagnosis and Functional Assessment of Coronary Artery Disease in Patients With Severe Aortic Stenosis.

More than half of patients with severe aortic stenosis (AS) over 70 years old have coronary artery disease (CAD). Exertional angina is often present in AS-patients, even in the absence of significant CAD, as a result of oxygen supply/demand mismatch and exercise-induced myocardial ischemia. Moreover, persistent myocardial ischemia leads to extensive myocardial fibrosis and subsequent coronary microvascular dysfunction (CMD) which is defined as reduced coronary vasodilatory capacity below ischemic threshold. Therefore, angina, as well as noninvasive stress tests, have a low specificity and positive predictive value (PPV) for the assessment of epicardial coronary stenosis severity in AS-patients. Moreover, in symptomatic patients with severe AS exercise testing is even contraindicated. Given the limitations of noninvasive stress tests, coronary angiography remains the standard examination for determining the presence and severity of CAD in AS-patients, although angiography alone has poor accuracy in the evaluation of its functional severity. To overcome this limitation, the well-established invasive indices for the assessment of coronary stenosis severity, such as fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR), are now in focus, especially in the contemporary era with the rapid increment of transcatheter aortic valve replacement (TAVR) for the treatment of AS-patients. TAVR induces an immediate decrease in hyperemic microcirculatory resistance and a concomitant increase in hyperemic flow velocity, whereas resting coronary hemodynamics remain unaltered. These findings suggest that FFR may underestimate coronary stenosis severity in AS-patients, whereas iFR as the non-hyperemic index is independent of the AS severity. However, because resting coronary hemodynamics do not improve immediately after TAVR, the coronary vasodilatory capacity in AS-patients treated by TAVR remain impaired, and thus the iFR may overestimate coronary stenosis severity in these patients. The optimal method for evaluating myocardial ischemia in patients with AS and co-existing CAD has not yet been fully established, and this important issue is under further investigation. This review is focused on challenges, limitations, and future perspectives in the functional assessment of coronary stenosis severity in these patients, bearing in mind the complexity of coronary physiology in the presence of this valvular heart disease.

Physiological Significance of Myocardial Bridging by Fractional Flow Reserve—An Observational Study

Background Myocardial bridge (MB) is a portion of an epicardial coronary artery that takes an intramuscular course. The systolic compression of MB often gets carried over to early and mid-diastole, compromising coronary blood flow. In clinical practice, we encounter patients with angina, non-invasive evidence of ischemia, and a MB as the only relevant finding on angiography. In view of studies in support of decreased coronary flow reserve in MB, we assessed the physiological significance of MB by fractional flow reserve (FFR). Methods and Results We enrolled eight patients with chronic stable angina and positive noninvasive stress test, who had no significant CAD, and with evidence of MB in the left anterior descending artery. Mean age of population was 57.14 ± 6.25 years. Two (25%) were females and six (75%) were males. Four (50%) were smokers, five (62.5%) were diabetics, and two (25%) were hypertensives. Mean length of MB is 19.4 ± 5.04 mm. All underwent physiological assessment by FFR and the baseline, post nitroglycerin (NTG), and post adenosine readings were noted. Mean pre-NTG value, post-NTG, and post-adenosine were 0.974 ± 0.022, 0.96 ± 0.03, and 0.88 ± 0.042 (≤0.80 hemodynamically significant) respectively. Paired t-test showed significant reduction in FFR after NTG (p = 0.0452) and post-adenosine (p = 0.011) but all eight patients did not get significant FFR. Conclusion MB was found to be physiologically insignificant in our group of patients. But a statistical significant reduction of FFR in MB, post NTG and post adenosine, does impress on the fact that, an extensive study over a longer period of course, could throw light on this unsettled area of physiological significance and optimal therapeutic approach.

Interleukin-35 Levels in Patients with Stable Coronary Artery Disease.

ResumoFundamento Foi demonstrado que as subunidades de interleucina-35 (IL-35) estão fortemente expressas nas placas ateroscleróticas em humanos. Assim, considera-se que elas têm um papel na aterosclerose.Objetivos Neste estudo, os níveis de IL-35 foram comparados com o grupo controle em pacientes com doença arterial coronariana (DAC) estável, e a associação entre os níveis de IL-35 e o tipo, gravidade e extensão da lesão foram investigadas com o escore Gensini (GS) e o escore Syntax (SS) no grupo de pacientesMétodos Sessenta pacientes (18 mulheres e 42 homens) com DAC, diagnosticados por meio da angiografia coronária, que apresentaram dor no peito típica e teste de esforço não invasivo positivo, e 46 pacientes (18 mulheres e 28 homens) com luminograma normal, foram incluídos no estudo. Tanto o GS quanto o SS foram calculados para o grupo de pacientes, e esses valores foram comparados com os níveis de IL-35. Variáveis com distribuição não normal foram avaliadas com o teste U de Mann-Whitney, enquanto os parâmetros com distribuição normal foram analisados com o teste t de Student. A diferença entre as variáveis categóricas foi avaliada pelo teste de qui-quadrado ou de Fisher. Os valores de p<0,05 foram considerados como estatisticamente sinificativos.Resultados Não foram observadas diferenças significativas entre pacientes e o grupo controle em termos de características demográficas e achados laboratoriais. Em comparação ao grupo controle, os níveis de IL-35 no grupo com DAC foram consideravalmente menores (36,9±63,9 ng/ml vs. 33,2±13,2 ng/ml, p<0,008). Embora não tenha sido estatisticamente significativo, os níveis de IL-35 foram maiores em pacientes com SS mais baixo do que nos com SS mais alto (33,2±13,7 vs. 31,8±8,9, p=0,51). Os valores de IL-35 em pacientes com GS alto foram significativamente mais baixos do que em pacientes com GS baixo (35±17,4 vs. 30,7±8,6, p=0,043).Conclusão Demonstrou-se que os níveis de IL-35 podem ser um novo biomarcador para a DAC estável, e que a IL-35 está associada à extensão da DAC.

Prognostic value of coronary risk factors, exercise capacity and single photon emission computed tomography in liver transplantation candidates: A 5-year follow-up study

BackgroundAlthough consensus-based guidelines support noninvasive stress testing prior to orthotopic liver transplantation (OLT), the optimal screening strategy for assessment of coronary artery disease in patients with end-stage liver disease (ESLD) is unclear. This study sought to determine the relative predictive value of coronary risk factors, functional capacity, and single photon emission computed tomography (SPECT) on major adverse cardiovascular events and all-cause mortality in liver transplantation candidates. MethodsPrior to listing for transplantation, 404 consecutive ESLD patients were referred to a University hospital for cardiovascular (CV) risk stratification. All subjects met at least one of the following criteria: inability to perform > 4 METs by history (62%), insulin-treated diabetes mellitus (53%), serum creatinine > 1.72 mg/dL (8%), history of MI, PCI or CABG (5%), stable angina (3%), cerebrovascular disease (1%), peripheral vascular disease (1%). Subjects underwent Technetium-99m SPECT with multislice coronary artery calcium scoring (CACS) using exercise treadmill or standard adenosine stress in those unable to achieve 85% maximal heart rate (Siemens Symbia T16). Abnormal perfusion was defined as a summed stress score (SSS) ≥ 4. ResultsOf the 404 patients, 158 (age 59 ± 9 years; male 68%) subsequently underwent transplantation and were included in the primary analysis. Of those, 50 (32%) died after a mean duration follow-up of 5.4 years (maximal 10.9 years). Most deaths (78%) were attributed to noncardiovascular causes (malignancy, sepsis, renal failure). Of the 32 subjects with abnormal perfusion (20%), nine (6%) had a high-risk perfusion abnormality defined as a total perfusion defect size (PDS) ≥ 15% and/or an ischemic PDS ≥ 10%. Kaplan–Meier survival curves demonstrated abnormal perfusion was associated with increased CV mortality (generalized Wilcoxon, P = 0.014) but not all-cause death. Subjects with both abnormal perfusion and an inability to exercise > 4 METs had the lowest survival from all-cause death (P = 0.038). Abnormal perfusion was a strong independent predictor of CV death (adjusted HR 4.2; 95% CI 1.4 to 12.3; P = 0.019) and MACE (adjusted HR 7.7; 95% CI 1.4 to 42.4; P = 0.018) in a multivariate Cox regression model that included age, sex, diabetes, smoking and the ability to exercise > 4 METs. There was no association between CACS and the extent of perfusion abnormality, nor with outcomes. ConclusionsMost deaths following OLT are noncardiovascular. Nonetheless, abnormal perfusion is prevalent in this high-risk population and a stronger predictor of cardiovascular morbidity and mortality than functional status. A combined assessment of functional status and myocardial perfusion identifies those at highest risk of all-cause death. (Exercise Capacity and Single Photon Emission Computed Tomography in Liver Transplantation Candidates [ExSPECT]; ClinicalTrials.gov Identifier: NCT03864497).

Abstract 10157: Incremental Medical Expenditure and Effectiveness of Early Non-invasive Cardiac Testing in Suspected Acute Coronary Syndrome

Introduction: The relationship between medical expenditure and long-term effectiveness of early (within 72 hours) non-invasive cardiac stress testing (NIT) in reducing future acute myocardial infraction (AMI) is not well understood. We estimated the value of early NIT after an emergency department (ED) evaluation for suspected acute coronary syndrome (ACS). Methods: This was a retrospective cohort study of adult (18+) patients with chest pain, presenting at EDs within the Kaiser Permanente Southern California health system from 10/2015-12/2018. We analyzed the direct medical expenditure associated with medical office visits, hospital facility and ED visits, pharmacy utilization, hospice stays, skilled nursing stays, home health, dialysis, laboratory and radiology utilization during the one year following the index chest pain ED visit. We also identified incidence of AMI during the 1-year follow-up. We used 2-stage residual inclusion instrumental variables (IV) techniques to evaluate the marginal effect of early NIT on total all cause expenditure as well as subgroups of utilization. We used control functions IV techniques to evaluate the marginal effect of NIT on AMI and calculated the number needed to treat (NNT) as the inverse of the absolute risk reduction. All models adjusted for socio-demographics, cardiovascular disease (CVD) history and treatment and non-CVD comorbidities. Results: The cohort included 91250 patients (mean age 58 years, female 58%) and 19% received early NIT. The marginal difference in total expenditure between the early NIT vs controls was $2,583 (95% CI $591 to $4,575) and was mainly related to the index ED visit (Table 1). Those who received early NIT had slightly lower risk of AMI during the 1-year follow-up (risk reduction 1.3% (-1.9% to -0.7%) resulting in NNT of 75. Conclusions: Early NIT offers minor risk reduction of AMI but with an increase of $2583 in expenditure. With a NNT of 75, the cost to avoid one AMI is estimated to be $193,725.

Abstract 11219: Impact of Echocardiographic Assessment During First Outpatient Cardiology Consultation on Patient Management

Background: Goal directed point of care echo (POCE) has emerged as a quick, bedside tool to assess cardiac structure and function. However, impact of physician performed POCE during cardiac consultation on immediate patient diagnosis, downstream testing and management has not been assessed. Purpose: To study the impact of POCE performed by consulting cardiologist (CC) during initial cardiology consult. Methods: 69 study patients (pts) underwent examination by an expert imaging CC from Jan 2014-May 2016. During 1-hour consultation, medical records were reviewed, medical history and physical exam was performed followed by cardiologist-performed POCE (Philips CX50). We included a matched control group of 65 pts seen by 3 different CCs during the same time period who underwent standard echo (Secho) up to 3 months after the initial visit. Results: Baseline characteristics were comparable between the two groups for age (mean of 62 ) , cardiac risk factors, and referral diagnoses. POCE findings and Secho (mean delay of 17.2 days after visit) are shown in Table1 and diagnostic tests ordered following initial visit in both groups in Figure 1. POCE had greater yield of echo abnormalities and led to less referral for noninvasive stress testing, more cardiovascular medication changes (15.3 vs 5.7% pts) and more advanced cardiac testing (21 vs 9% pts) compared to the control group after the initial visit. Conclusion: Focused echo at time of consultation leads to more medication adjustments, less referral for noninvasive stress testing, earlier referral for advanced cardiac diagnostic imaging and shortens time to advanced diagnostic workup by about two weeks.

Cardiovascular Evaluation of Liver Transplant Patients by Using Coronary Calcium Scoring in ECG-Synchronized Computed Tomographic Scans.

Background: The goal of cardiac evaluation of patients awaiting orthotopic liver transplantation (OLT) is to identify the patients at risk for cardiovascular events (CVEs) in the peri- and postoperative periods by opportunistic evaluation of coronary artery calcium (CAC) in non-gated abdominal computed tomographs (CT). Methods: We hypothesized that in patients with OLT, a combination of Lee’s revised cardiac index (RCRI) and CAC scoring would improve diagnostic accuracy and prognostic impact compared to non-invasive cardiac testing. Therefore, we retrospectively evaluated 169 patients and compared prediction of CVEs by both methods. Results: Standard workup identified 22 patients with a high risk for CVEs during the transplant period, leading to coronary interventions. Eighteen patients had a CVE after transplant and a CAC score > 0. The combination of CAC and RCRI ≥ 2 had better negative (NPV) and positive predictive values (PPV) for CVEs (NPV 95.7%, PPV 81.6%) than standard non-invasive stress tests (NPV 92.0%, PPV 54.5%). Conclusion: The cutoff value of CAC > 0 by non-gated CTs combined with RCRI ≥ 2 is highly sensitive for identifying patients at risk for CVEs in the OLT population.

Анализ периоперационного ведения пациентов с сопутствующей сердечно-сосудистой патологией при некардиальных операционных вмешательствах

Актуальность. Хорошо спланированная и обоснованная дооперационная подготовка является важным инструментом снижения риска периоперационных осложнений. Европейским обществом кардиологов (ESC, 2014) и Европейским обществом анестезиологов (ESA, 2018) опубликованы рекомендации по подготовке пациента с сопутствующей кардиальной патологией к некардиальным операционным вмешательствам. Однако в нашу клиническую практику данные рекомендации имплементированы недостаточно. Целью нашей работы было проанализировать рутинную дооперационную подготовку пациента и выявить моменты, которые можно приблизить к рекомендованным стандартам с целью снижения периоперационных сердечно-сосудистых осложнений. Материалы и методы. Мы проанализировали 242 истории болезни пациентов, поступивших на плановое стационарное хирургическое лечение. Была проанализирована дооперационная подготовка с учетом клинических кардиальных факторов риска и факторов риска оперативного вмешательства. Результаты. Пациентам проведены стандартные обследования согласно установленным правилам. У всех пациентов зарегистрированы показатели электрокардиограммы, 47 % больным проведена эхокардиография покоя, 3 % выполнен тропониновый тест. С учетом интерполяции рекомендаций ESC и ESA на нашу выборку определение функциональной способности было целесообразным у 167 человек (69 %) с последующими оценкой клинических кардиальных факторов риска и определением необходимости проведения неинвазивных стресс-тестов лицам высокого риска возникновения инфаркта мио­карда и сердечной смерти. Кардиальные биомаркеры было целесообразно определить у 44 пациентов (18 %), регистрировать показатели электрокардиограммы покоя — у 127 пациентов (53 %), а эхокардиографии покоя — у 38 лиц (16 %). Такая тактика требует налаживания коммуникации между амбулаторным и стационарным звеньями медицинской системы. Выводы. Дооперационная подготовка большинства пациентов происходит в течение 24–48 часов после госпитализации в хирургическое отделение. Мы не используем определение функциональной способности пациента, не применяем шкалы оценки риска, не проводим неинвазивные стресс-тесты, недостаточно определяем кардиальные биомаркеры. Однако чаще проводим рутинные обследования, которые не являются решающими в данной клинической ситуации. В современных условиях наши клиники имеют достаточно ресурсов для внедрения рекомендаций ESC и ESA в клиническую практику.

Cardiac Scintigraphy and Screening for Transthyretin Cardiac Amyloidosis: Caveat Emptor.

Cardiac Scintigraphy and Screening for Transthyretin Cardiac Amyloidosis: Caveat Emptor.

Assessment of Stress Level of Young Undergraduates Before and After a Degree Examination Using Heart Rate Variability Analysis

This study aimed at assessing the value of heart rate variability (HRV) as a stress indicator before and after a final re-sit exam among healthy sixth grade medical students. Fifty participants were recruited for the study (test group, n = 30; control group, n = 20). Each participant was examined for 5 minutes pre and post exam periods using the Heartmath proprietary protocol. EmWave equipment was used to detect, record and analyze the HR and to plot out the variability in discrete percentages for low, medium and high coherences. Results indicated that mean percentage coherence score was significantly higher in the test group (p &lt; 0.05) at low cardiac coherence domain, but lower (p &lt; 0.05) at the high coherence domain, compared with the control. Coherence score was significantly higher (p &lt; 0.05) after the exam indicating release from stress, as compared to before the examination when stress was observable among the exam candidates. There were no significant gender differences observed in cardiac coherence scores before and after examination. Our findings indicate that HRV is a reliable indicator of real-time exam stress and supports future clinical use of HRV as a non-invasive and simple stress test.

Prognostic Value of Stress Cardiac Magnetic Resonance in Patients With Known Coronary Artery Disease

ObjectivesThis study sought to determine whether stress cardiac magnetic resonance (CMR) provides clinically relevant risk reclassification in patients with known coronary artery disease (CAD) in a multicenter setting in the United States. BackgroundDespite improvements in medical therapy and coronary revascularization, patients with previous CAD account for a disproportionately large portion of CV events and pose a challenge for noninvasive stress testing. MethodsFrom the Stress Perfusion Imaging in the United States (SPINS) registry, we identified consecutive patients with documented CAD who were referred to stress CMR for evaluation of myocardial ischemia. The primary outcome was nonfatal myocardial infarction (MI) or cardiovascular (CV) death. Major adverse CV events (MACE) included MI/CV death, hospitalization for heart failure or unstable angina, and late unplanned coronary artery bypass graft. The prognostic association and net reclassification improvement by ischemia for MI/CV death were determined. ResultsOut of 755 patients (age 64 ± 11 years, 64% male), we observed 97 MI/CV deaths and 210 MACE over a median follow-up of 5.3 years. Presence of ischemia demonstrated a significant association with MI/CV death (HR: 2.30; 95% CI: 1.54-3.44; P < 0.001) and MACE (HR: 2.24 ([95% CI: 1.69-2.95; P < 0.001). In a multivariate model adjusted for CV risk factors, ischemia maintained strong association with MI/CV death (HR: 1.84; 95% CI: 1.17-2.88; P = 0.008) and MACE (HR: 1.77; 95% CI: 1.31-2.40; P < 0.001) and reclassified 95% of patients at intermediate pretest risk (62% to low risk, 33% to high risk) with corresponding changes in the observed event rates of 1.4% and 5.3% per year for low and high post-test risk, respectively. ConclusionsIn a multicenter cohort of patients with known CAD, CMR-assessed ischemia was strongly associated with MI/CV death and reclassified patient risk beyond CV risk factors, especially in those considered to be at intermediate risk. Absence of ischemia was associated with a <2% annual rate of MI/CV death. (Stress CMR Perfusion Imaging in the United States [SPINS] Study; NCT03192891)

Appropriate coronary revascularization can be accomplished if myocardial perfusion is quantified by positron emission tomography prior to treatment decision

BackgroundMany patients undergo percutaneous coronary intervention (PCI) without the use of non-invasive stress testing prior to treatment. The aim of this study was to determine the potential added value of guiding revascularization by quantitative assessment of myocardial perfusion prior to intervention. Methods and ResultsThirty-three patients (10 females) with suspected or established CAD who had been referred for a clinical coronary angiography (CA) with possibility for PCI were included. Adenosine stress and rest 13N-NH3 PET, cardiac magnetic resonance (CMR), and cardiopulmonary exercise test were performed 4 ± 3 weeks before and 5 ± 1 months after CA. The angiographer was blinded to the PET and CMR results. Myocardial flow reserve (MFR) < 2.0 by PET was considered abnormal. A PCI was performed in 19/33 patients. In 41% (11/27) of the revascularized vessel territories, a normal regional MFR was found prior to the PCI and no improvement in MFR was found at follow-up (P = 0.9). However, vessel territories with regional MFR < 2.0 at baseline improved significantly after PCI (P = 0.003). Of the 14 patients not undergoing PCI, four had MFR < 2.0 in one or more coronary territories. ConclusionAssessment of quantitative myocardial perfusion prior to revascularization could lead to more appropriate use of CA when managing patients with stable CAD.

CORRIGENDUM

Clinical TransplantationVolume 35, Issue 6 e14342 CORRIGENDUMFree Access CORRIGENDUM This article corrects the following: Kidney transplantation in valvular heart disease and pulmonary hypertension: Consensus in waiting Ajay Kumar Jha Suman Lata Volume 35Issue 1Clinical Transplantation First Published online: November 27, 2020 First published: 18 May 2021 https://doi.org/10.1111/ctr.14342AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat In the article by Jha, AK, Lata, S.,1 in the sixth line of figure 4, the Yes or No sequence should be reversed. However, in the main text, Figure 4 has been correctly described. The updated Figure 4 is given below, FIGURE 4Open in figure viewerPowerPoint Management algorithm in end-stage renal disease (ESRD) with pulmonary hypertension. ABG indicates arterial blood gas; AV fistula indicates arteriovenous fistula; CAD indicates coronary artery disease; CTD indicates connective tissue disease; DPG indicates diastolic pressure gradient (pulmonary artery diastolic pressure – pulmonary capillary wedge pressure); HIV indicates human immunodeficiency virus; HRCT indicates high-resolution computed tomography; KT indicates kidney transplantation; LFT indicates liver function test; PA indicates pulmonary artery; PR indicates pulmonary regurgitation; PFT indicates pulmonary function test; RA indicates right atrium; RVSP indicates right ventricular systolic pressure; SSc indicates systemic sclerosis; TPG indicates transpulmonary gradient (mean pulmonary artery pressure – pulmonary capillary wedge pressure); and TRV indicates tricuspid regurgitant velocity. $Indications for noninvasive stress test should be based on the presence of risk factors (> 2) and/or wall motion abnormality and/or metabolic equivalent of tasks (METs < 4); coronary angiography should be performed in the presence of positive noninvasive stress test, regional wall motion abnormality, and poor effort tolerance (<4 METs). *Significant coronary artery disease indicates 50% reduction in the lumen of left main coronary artery and/or 70% reduction in the lumen of any major coronary artery (left anterior descending artery, left circumflex artery, right coronary artery REFERENCE 1Jha AK, Lata S. Kidney transplantation in valvular heart disease and pulmonary hypertension: Consensus in waiting. Clin Transplant. 2021; 35:e14116. https://doi.org/10.1111/ctr.14116Wiley Online LibraryPubMedWeb of Science®Google Scholar Volume35, Issue6June 2021e14342 FiguresReferencesRelatedInformation

Heart failure with preserved ejection fraction: the role of diastolic stress test in diagnostic algorithms

Heart failure (HF) with preserved ejection fraction (HFpEF) is currently the most common type of this condition, especially among elderly patients. Despite the preserved left ventricular (LV) and a moderate increase in natriuretic peptide, patients with HFpEF have the same out-of-hospital mortality as those with HF with reduced ejection fraction (HFrEF). Diagnosis of HFpEF is difficult due to nonspecific symptoms, expensive blood tests, and questionable rest echocardiographic data on diastolic function. In addition, the reason for poor diagnosis of HfpEF in clinical practice may be old age and comorbidities, which can also cause nonspecific symptoms of moderate chronic shortness of breath, weakness, and palpitations. The consequence is the detection of HFpEF only in every fourth patient with an acute or chronic heart failure. The use of simplified clinical diagnostic protocols along with a non-invasive ultrasound stress test can help overcome the existing problems in the diagnosis of HFpEF.

Relationship of Stress Test Findings to Anatomic or Functional Extent of Coronary Artery Disease Assessed by Coronary Computed Tomography Angiography-Derived Fractional Flow Reserve.

Background In the United States, functional stress testing is the primary imaging modality for patients with stable symptoms suspected to represent coronary artery disease (CAD). Coronary computed tomography angiography (CTA) is excellent at identifying anatomic coronary artery disease (CAD). The application of computational fluid dynamics to coronary CTA allows fractional flow reserve (FFR) to be calculated noninvasively (FFRCT). The relationship of noninvasive stress testing to coronary CTA and FFRCT in real-world clinical practice has not been studied. Methods We evaluated 206 consecutive patients at Loyola University Chicago with suspected CAD who underwent noninvasive stress testing followed by coronary CTA and FFRCT when indicated. Patients were categorized by stress test results (positive, negative, indeterminate, and equivocal). Duke treadmill score (DTS), METS, exercise duration, and chest pain with exercise were analyzed. Lesions ≥ 50%stenosis were considered positive by coronary CTA. FFRCT < 0.80 was considered diagnostic of ischemia. Results Two hundred and six patients had paired noninvasive stress test and coronary CTA/FFRCT results. The median time from stress test to coronary CTA was 49 days. Average patient age was 60.3 years, and 42% were male. Of the 206 stress tests, 75% were exercise (70% echocardiographic, 26% nuclear, and 4% EKG). There were no associations of stress test results with CAD > 50% or FFRCT < 0.80 (p = 0.927 and p = 0.910, respectively). Of those with a positive stress test, only 30% (3/10) had CAD > 50% and only 50% (5/10) had FFRCT < 0.80. Chest pain with exercise did not correlate with CAD > 50% or FFRCT < 0.80 (p = 0.66 and p = 0.12, respectively). There were no significant correlations between METS, DTS, or exercise duration and FFRCT (r = 0.093, p = 0.274; r = 0.012, p = 0.883; and r = 0.034, p = 0.680; respectively). Conclusion Noninvasive stress testing, functional capacity, chest pain with exercise, and DTS are not associated with anatomic or functional CAD using a diagnostic strategy of coronary CTA and FFRCT.

Preload stress echocardiography by using dynamic postural alteration can identify high risk patients with heart failure with reduced ejection fraction

Abstract Funding Acknowledgements Type of funding sources: None. Background Haemodynamic assessment during stress testing is not commonly performed for patients with heart failure with reduced ejection fraction (HFrEF) due to its invasiveness, less feasibility, and safety concerns. Passive leg-lifting (PLL) manoeuvres have been introduced as a simple alternative for non-invasive preload stress testing; however, the haemodynamic load imposed on the cardiovascular system is unsatisfactory, which precludes the accurate assessment of the preload reserve for patients with HF. Purpose The purpose of this study was to assess the haemodynamic characteristics of patients with HFrEF in response to a preload stress during dynamic postural alterations by combining the semi-sitting position (SSP) and PLL. We also evaluated whether combined postural stress could be used for risk stratification for these patients. Methods For this study, 101 patients with HFrEF and 35 age- and sex-matched normal controls were prospectively recruited. At each postural position (i.e., baseline, SSP, and PLL), all standard echocardiographic and Doppler variables were obtained. Adverse cardiac events were prespecified as the combined endpoints of death from or hospitalisation for deteriorated HF, or sudden cardiac death. Clinical follow-up was conducted for a median of 7 months. Results During PLL stress, the stroke volume index (SVi) significantly increased in both controls (from 40 ± 6 to 43 ± 6 mL/m², P = 0.03) and HFrEF patients (from 31 ± 9 to 34 ± 10 mL/m², P = 0.03). Conversely, during SSP stress, the SVi significantly decreased for both controls (from 40 ± 6 to 37 ± 6 mL/m², P = 0.03) and HFrEF patients (31 ± 9 to 28 ± 8 mL/m², P = 0.03). During the follow-up period, 16 patients developed cardiac events. In patients without events, the Frank-Starling mechanism was well preserved (Fig. A). Namely, the SVi significantly increased from 31 ± 9 to 35 ± 10 mL/m² (P = 0.02) during PLL stress, while the SVi significantly decreased from 31 ± 8 to 28 ± 8 mL/m² (P = 0.02) during SSP stress. In contrast, for patients with cardiac events, the SVi did not change during postural alterations (n.s), which indicated that the failing heart operates on the flat portion of the Frank-Starling curve (Fig. A). When patients were divided into three equal sub-groups based on the total difference in the SVi during dynamic postural stress, patients with impaired preload reserve (third trimester, ΔSVi ≤ 3.0 mL/m²) showed significantly worse event-free survival than the other two sub-groups (Fig. B; P &amp;lt; 0.001). In a Cox proportional-hazard analysis, baseline LVEF (hazard ratio 0.93; P = 0.04), and ΔSVi during postural stress (hazard ratio 0.76; P = 0.004) were predictors of future cardiac events. Conclusions The combined assessment of dynamic postural stress during PLL and SPP is a simple, time-saving, and easy-to-use clinical tool for the assessment of preload reserve for patients with HFrEF. Moreover, postural stress echocardiography proved to contribute to the risk stratification for these patients. Abstract Figure.

Blood pressure variability in patients with angina and non-obstructive coronary artery disease.

There is a real challenge in the management of ischemia with non-obstructive coronary artery disease. So, we need to study the mechanisms of persistent angina and non-obstructive coronary artery (ANOCA) patients. One of those possible mechanisms is blood pressure variability (BPV). We aimed to study the relation between BPV and angina in patients with non-obstructive coronary artery disease. Our study included 150 patients with chest pain and positive non-invasive stress test suggestive of myocardial ischemia and normal coronary angiography or non-obstructive coronary artery disease. We used an ambulatory blood pressure monitoring device. We found a positive correlation between BPV as measured by average real variability (ARV) as well as standard deviation (SD) parameters and the severity of anginal symptoms with P values for all parameters was 0.001 except day systolic SD P-value was 0.021. We performed a regression analysis for all statistically significant parameters. We found that 24H diastolic ARV, day diastolic ARV, night diastolic ARV, 24H diastolic SD, day diastolic SD, and night diastolic SD were independent predictors of the severity of angina with P-values (0.015, 0.007, 0.011, 0.037, 0.014, and 0.029), respectively. We concluded that short-term BPV represented by ARV and SD had a consistent association with angina in patients with non-obstructive coronary artery disease. The diastolic parameters of ARV and SD were independent predictors of the severity of angina with non-obstructive coronary artery disease.

Left Ventricular Twist and Untwist in Patients Undergoing Elective Percutaneous Coronary Intervention.

Background:Left ventricular (LV) twist and untwist plays important roles in physiological adaptation and development of clinically relevant cardiac diseases.Aims:To assess LV twist and untwist in patients undergoing elective percutaneous coronary intervention (PCI) by two-dimensional (2D) speckle tracking echocardiography (STE).Subjects and Methods:Fifty patients who had stable angina pectoris and/or abnormal result from noninvasive stress tests were enrolled after undergoing elective PCI. Conventional and 2D STE were performed before elective PCI and after 3 months.Results:There was no significant systolic improvement in conventional echocardiography. However, there was a significant diastolic improvement after elective PCI as higher E, E/A, e` and lower E/e` (P < 0.034, <0.042, 0.015, and 0.033, respectively). In addition, there was a statistically significant improvement of STE-derived systolic parameters as regard higher global longitudinal strain, peak twist, and torsion (P value 0.009, 0.009, and < 0.001, respectively). Furthermore, there was significant improvement of STE-derived diastolic parameters as higher peak untwist, recoil, and lower time to peak untwist (P value 0.013, 0.001, and 0.004, respectively).Conclusions:LV and untwist parameters were improved before most of conventional echocardiographic parameters in postrevascularization of stable coronary artery disease.

Adherence to Clinical Quidelines on Preoperative Assessment and Correction of Cardiovascular Risk in Non-cardiac Surgery

Surgical care is associated with a high risk of complications. In 2014 the updated joint ESC/ESA guidelines on preoperative assessment and perioperative management of patients were published to improve patient safety in non-cardiac surgery. The increase in the adherence to clinical guidelines promotes the improving of the healthcare quality and safety improvement.Aim. To study physicians' level of adherence to ESC/ESA clinical guidelines for preoperative assessment and perioperative management of patients.Material and methods. A retrospective observational study included 102 patients admitted to Moscow general hospital from 01.03.2019 to 30.06.2018 for elective surgery. All of them underwent preoperative examination in outpatient department of the hospital and had at least one concomitant disease requiring drug therapy. The medical records data on the preoperative examination and perioperative treatment with beta-blockers, HMG CoA reductase inhibitors and angiotensin-converting-enzyme (ACE) inhibitors/ angiotensin receptor blockers (ARBs) were analyzed for compliance with the ESC/ESA guidelines.Results. A standardized cardiac risks assessment was not documented in the results of preoperative examination. Electrocardiography (ECG), echocardiography and non-invasive stress tests were performed according to clinical guidelines in 100%, 77.8% and 25% of cases, respectively. Unnecessary ECG and echocardiography were prescribed in 50.5% and 72% of cases, respectively. Appropriate correction of ACE inhibitors/ARBs therapy was performed in 66.7% patients with congestive heart failure and only in 2.7% with arterial hypertension. In 19 patients with ischemic cardiac disease, 13 (84.2%) patients received HMG CoA reductase inhibitors and 16 (68.4%) ones received beta-blockers during hospitalization. Inappropriate omission of statins, beta-blockers and ACE inhibitors (ARBs) during hospitalization was registered in 22.2%, 11% and 4.9% patients, respectively.Conclusion. The number of inappropriate ECGs and echocardiographies, as well as incorrect treatment with beta-blockers, HMG CoA reductase inhibitors and ACE inhibitors (ARBs) in perioperative period evidence that the adherence of physicians to the clinical guidelines on preoperative assessment and perioperative management of patients remains low.It is reasonably to develop risk-based interdisciplinary protocols for preoperative examination, algorithms for interdisciplinary communication and interaction between specialists and the healthcare levels, as well as physicians' education for better adherence to clinical guidelines.