Valvular Heart Surgery Research Articles

Right thoracotomy with central cannulation for valve surgery: 10 years of experience.

The aim of this study is to report the early outcomes of valvular heart surgeries performed via the right thoracotomy approach. While thoracotomy with femoro-femoral bypass is an established method for minimally invasive open-heart surgeries, thoracotomy with conventional cannulation is still being explored. In our center, we conducted 958 valvular heart surgery cases using the right anterolateral thoracotomy approach with central cannulation and data were analyzed. This is a retrospective observational study based on prospectively collected data from patients who underwent valvular heart surgery at our center spanning from April 2013 to April 2023. The data encompass demographics, procedures, operative techniques, post-operative morbidity, mortality, and a 1-month follow-up. Our study revealed no procedure-related mortality. No patient required conversion to median sternotomy. Smooth cannulation and satisfactory exposure were achieved in all patients. The study encompassed a wide age range, from 14 to 68 years, with 618 female patients (64.5%) and 340 male patients (35.5%). The average cross-clamp time ranged from 38 to 90min, the duration of cardio-pulmonary bypass ranged from 45 to 105min, post-operative extubation ranged from 3 to 8h, the average drain volume ranged from 100 to 350ml, and the incision size ranged from 5 to 7cm. Our data demonstrate that conventional cannulation via the right antero-lateral thoracotomy approach for valvular heart disease is a viable alternative to reduce the side effects associated with sternotomy and femoral cannulation. This procedure is safe, reproducible, and provides the same level of treatment quality.

Impact of Residential Remoteness on Valvular Heart Surgery Outcomes in Western Australia (WA)

Impact of Residential Remoteness on Valvular Heart Surgery Outcomes in Western Australia (WA)

Association of serum creatinine trajectories with one-year mortality after valvular heart surgery: a retrospective cohort study.

Acute renal dysfunction is defined by the maximum increase in serum creatinine (sCr) without considering the pattern of change in sCr. We aimed to identify longitudinal patterns (trajectories) of postoperative sCr concentrations and investigate their association with long-term outcomes in patients undergoing valvular heart surgery. In this retrospective review of 3,436 patients who underwent valvular heart surgery, we applied trajectory projection cluster analysis to identify the trajectories of sCr changes from baseline during the seven postoperative days. Primary and secondary endpoints were to investigate the associations of sCr trajectories with mortality using Kaplan-Meier curves and Cox proportional hazards regression analysis, and a composite of major adverse kidney events (MAKEs) at one year after surgery, respectively. Four clusters were identified: Clusters 1 and 2, a minimal change in sCr (90.1% of patients); Cluster 3, a significant and persistent increase in sCr (4.1% of patients); and Cluster 4, a significant but transient increase in sCr (5.8% of patients). The one-year postoperative mortality rate was higher in Cluster 3 (18.4%) and Cluster 4 (11.6%) than in Cluster 1+2 (2.7%). The Kaplan-Meier survival curve demonstrated significant differences in mortality rates among the clusters (log-rank test, P<0.001). In the multivariable Cox analysis, the sCr trajectory cluster was an independent prognostic factor for mortality. Cluster 3 had a higher prevalence of MAKEs (37.6%) compared with Cluster 1+2 (6.8%, P<0.001) and Cluster 4 (24.1%, P=0.045). The cluster was an independent prognostic factor for MAKEs. The sCr trajectory clusters exhibited significantly different risks of mortality and MAKEs at one year after surgery. Through these sCr trajectories, we confirmed that both the extent of sCr increase and its sustainability during the first seven postoperative days were closely associated with the long-term prognosis after valvular heart surgery.

Modified Ultrafiltration Technique in Valvular Heart Surgery: A Case Series

Abstract Application of cardiopulmonary bypass (CPB) in cardiac surgery may cause systemic inflammatory reactions, possibly causing clinical sequelae and multiple organ failures such as systolic or diastolic dysfunction, regional or global left ventricle or right ventricle low contractility, and the function of vascular tone. The use of drugs (i.e., corticosteroids) and the ultrafiltration method during the CPB application has been known to prevent or minimize the complication of CPB in cardiac surgery. One of the non-pharmacological approaches to minimize those inflammatory responses is the modified ultrafiltration (MUF) technique. Theoretically, this is due to ultrafiltration which may reduce the interstitial fluid and inflammatory mediator. MUF can be used to counteract inflammatory responses in pediatric cardiac surgery. This ultrafiltration method became a recommended procedure in minimally invasive surgery and conventional open-heart surgery. However, studies about effectiveness in adults are limited. In this case series, the MUF technique was used in three patients who underwent valvular heart surgery with a CPB machine. Following the application of the CPB, the MUF technique is performed for 10 min at a speed of no more than 10% full flow. Hemodynamic measurements and interleukin-6 (IL-6) levels were taken during surgery and 24 h post-CPB. At 24 h post-CPB, the vasoactive inotropic score and duration of mechanical support use were less than 20 and 18–24 h, respectively, and the IL-6 level ranged from 7.22 to 14.22 pg/mL. The cardiac index increased, ranging from 2.43 to 3.47 L/min/m2, and pulmonary vascular resistance decreased, ranging from 78 to 146 dyne s/cm5.

Lack of awareness of secondary rheumatic prevention in preoperative candidates for mitral valve surgery - alarming situation.

We conducted this study to assess the compliance with secondary rheumatic prophylaxis among preoperative patients with rheumatic mitral valve disease undergoing valvular heart surgery at a tertiary care cardiac hospital in a developing country. This is a descriptive cross-sectional study conducted at a tertiary care cardiac hospital in Karachi, Pakistan. The inclusion criteria encompassed patients of any sex, aged between 18 and 80 years, who had been diagnosed with rheumatic mitral valve disease through transthoracic echocardiography and had undergone valvular heart surgery. The level of compliance with secondary rheumatic prophylaxis and barriers toward noncompliance was assessed during routine preoperative interview session. This preventive measure plays a crucial role in reducing the progression of the disease and improving patient outcomes. Out of the 239 patients included in the study, 125 (52.3%) were females, with a mean age of 38.8 ± 11.8 years. The majority of patients (88.7%) came from rural areas. Among the patients, 79 (33.1%) received rheumatic prophylaxis, while 160 (66.9%) did not adhere to it regularly. The common barriers for receiving rheumatic prophylaxis were non availability (41.0%) and nonaffordability (40.6%). Additionally, 28.0% of patients had lacked awareness of the importance of rheumatic prophylaxis, and 2.5% expressed fear of injection site pain and subsequent symptoms. A concerning level of noncompliance with secondary rheumatic prophylaxis was observed. The barriers identified in patients who did not receive rheumatic prophylaxis were primarily related to affordability, availability, lack of awareness, and fear of injection site pain and subsequent symptoms.

Frequency of Coronary Artery Disease in Patients Undergoing Valvular Heart Surgery: A Retrospective Observational Study

Objectives: Valvular heart disease (VHD) significantly impacts patients' lives and often necessitates cardiac surgery. This study aimed to assess the frequency of ischemic heart disease in patients undergoing valvular heart surgery. Methodology: This observational study analyzed the records of 204 consecutive patients presenting to the Peshawar Institute of Cardiology between January 2021 and December 2022. All patients underwent screening angiography before surgery according to the American College of Cardiology (ACC) criteria. Results: Among the 204 patients studied, 57.4% were male, with a mean age of 53.16 ± 12.708 years. Hypertension was the most common comorbid condition (38.2%). Mitral valve pathology was the predominant indication for valvular surgery, while isolated aortic stenosis was the most common valvular lesion observed (25%). Out of the 204 patients who underwent screening angiography, 23% had significant coronary artery disease (CAD), defined as luminal narrowing &gt;50%. Patients younger than 40 years had a lower prevalence of significant CAD (9.8%) compared to older patients (p = 0.003). Angiographic findings revealed single-vessel disease as the most common coronary lesion (16.7%), followed by double-vessel disease (12.7%), with triple-vessel disease observed in 5.4% of cases. Conclusion: The frequency of coronary artery disease was lower in patients younger than 40 years compared to older patients. Noninvasive investigations such as CT coronary angiography may serve as an alternative to invasive coronary angiography as a screening tool prior to cardiac surgery in older patients, if needed.

Commentary on'risk stratification model integrating nutritional and inflammatory factors for predicting 1-year mortality after valvular heart surgery: a retrospective cohort study'.

Commentary on'risk stratification model integrating nutritional and inflammatory factors for predicting 1-year mortality after valvular heart surgery: a retrospective cohort study'.

COMPARATIVE EVALUATION OF SEVOFLURANE AND ISOFLURANE IN FAST TRACK ANAESTHESIA FOR VALVULAR CARDIAC SURGERY: A RANDOMIZED STUDY

Objective: Contemporary valvular cardiac surgery has evolved with the adoption of expedited postoperative recovery, known as fast-tracking. This paradigm shift results from advancements in anaesthetic agents, surgical techniques, and myocardial protection strategies. Fast-track anaesthesia aims to reduce intensive care unit (ICU) stays and overall hospital length of stay (LOS), optimizing resource utilization. Cardioprotective properties of volatile anaesthetic agents, especially in mitigating ischemic myocardial damage, have garnered attention.&#x0D; Methods: A hospital-based, randomized, comparative study was conducted at the Department of Anaesthesiology, S. M. S Medical College, Jaipur. 70 undergoing valvular heart surgery under general anaesthesia, were randomly assigned to two groups: Group A (Sevoflurane) and Group B (Isoflurane). Inclusion criteria encompassed ASA grade II to IV patients aged 20 to 50 y, with a body weight of 30-65 kg, and willingness to provide written consent. Anaesthesia induction and maintenance involved the administration of Sevoflurane or Isoflurane based on group allocation. Hemodynamic parameters were recorded at various surgical stages.&#x0D; Results: Heart rate, systolic blood pressure, and cardiac output were statistically insignificant between groups at different surgical stages (p&gt;0.05). Intraoperative variables demonstrated no significant differences, except for a transient decrease in systolic blood pressure post-induction in both groups.&#x0D; Conclusion: The study underscores the comparable efficacy of Sevoflurane and Isoflurane in valvular cardiac surgery, supported by similar hemodynamic profiles. Understanding the nuances of volatile anaesthetic agents is crucial for their optimal clinical application, considering challenges like beta-blocker usage and perioperative hyperglycemia.

Tricuspid regurgitation: Frequency, clinical presentation, management and outcome among patients with severe left-sided valvular heart disease in Europe. Insights from the ESC-EORP Valvular Heart Disease II survey.

Tricuspid regurgitation (TR) is commonly observed in patients with severe left-sided valvular heart disease (VHD). This study sought to assess TR frequency, management and outcome in this population. Among 6883 patients with severe native left-sided VHD or previous left-sided valvular intervention enrolled in the EURObservational Research Programme prospective VHD II survey, moderate or severe TR was very frequent in patients with severe mitral VHD (30% when mitral stenosis, 36% when mitral regurgitation [MR]), especially in patients with secondary MR (46%), and rare in patients with severe aortic VHD (4% when aortic stenosis, 3% when aortic regurgitation). An increase in TR grade was associated with a more severe clinical presentation and a poorer 6-month survival (p < 0.0001). Rates of concomitant tricuspid valve (TV) intervention at the time of left-sided heart valve surgery were high at the time of mitral valve surgery (50% when mitral stenosis, 41% when MR). Concordance between class I indications (patients with severe TR) for concomitant TV surgery at the time of left-sided valvular heart surgery according to guidelines and real-practice decision-making was very good (88% overall, 95% in patients operated on for MR). In this large international prospective survey among patients with severe left-sided VHD, moderate/severe TR was frequent in patients with mitral valve disease and was associated with a poorer outcome as TR grade increased. In patients with severe TR, compliance to guidelines for class I indications for concomitant TV surgery at the time of left-sided heart valve surgery was very good.

Exploring the Impediments: Investigating Barriers to Participation in Phase-2 Cardiac Rehabilitation Following Coronary Artery Bypass Graft Among Thai Patients.

Despite the known benefits of cardiac rehabilitation (CR), the rate of participation is low following coronary artery bypass graft (CABG). The reasons for this lack of participation are unclear and there have been few studies investigating this, particularly in Asian countries. The present study aimed to address this lack of information and identify reasons for non-participation in phase-2 CR among patients who underwent CABG. We enrolled 42 patients who underwent CABG or CABG combined with valvular heart surgery in a university hospital between October 2016 to September 2018. Patients who participated in phase-1 but not phase-2 CR were interviewed by phone following an 11-item questionnaire. The rate of participation in phase-2 CR was only 12.5%. The most frequently reported reason for non-participation was "Did not know that there was phase-2 CR" (61.9%), followed by "Transportation problems" (31%). "Unable to take leave due to work schedule" was fairly frequently reported (19%) as was "Did not participate due to chronic diseases and complications" (14.3%). Our study revealed low participation in phase-2 CR, despite its well-known benefits. The primary reason identified was a lack of awareness and understanding among patients regarding phase-2 CR. This highlights the need for targeted interventions aimed at increasing knowledge and awareness of the benefits and availability of CR. Additionally, it is crucial to establish an efficient referral system that ensures seamless transitions from the initial cardiac treatment to the rehabilitation phase. Implementing these strategies is expected to boost CR participation, leading to improved patient outcomes and overall cardiac health.

Effect of Retrograde Autologous Priming on Coagulation Assessed by Rotation Thromboelastometry in Patients Undergoing Valvular Cardiac Surgery

ObjectivesTo investigate the effect of retrograde autologous priming (RAP) on coagulation function using rotation thromboelastometry (ROTEM) in patients undergoing valvular heart surgery. DesignProspective, randomized, patient- and outcome assessor-blinded study. SettingSingle-center university hospital. ParticipantsPatients aged 20 years or more undergoing valvular heart surgery. Interventions104 patients were allocated to the RAP or control group (1:1 ratio). In the RAP group, the prime was displaced into the collection bag before bypass initiation. ROTEM was performed at the induction of anesthesia, at the beginning of rewarming, and after the reversal of heparinization. Allogeneic plasma products and platelet concentrates were transfused according to ROTEM-based algorithms. Measurements and Main ResultsAn average volume of 635 ± 114 mL was removed using RAP (from the 1,600 mL initial prime volume). The hematocrit 10 min after CPB was 24.7 ± 3.5% in the control group and 26.1 ± 4.1% in the RAP group (P=0.330). ROTEM including EXTEM, INTEM, and FIBTEM showed prolonged clotting time and decreased maximal clot firmness after CPB in both groups, without intergroup differences. The number of patients who received intraoperative erythrocyte (27% vs. 25%, control vs. RAP, P=0.823), fresh frozen plasma (14% vs. 8%, control vs. RAP, P=0.339), cryoprecipitate (21% vs. 12%, control vs. RAP, P=0.185), or platelet concentrate transfusion (19% vs. 12%, control vs. RAP, P=0.277) did not differ between the groups. ConclusionsCPB induced impaired coagulation function on ROTEM. However, RAP did not improve coagulation function when compared with conventional priming in patients undergoing valvular heart surgery.

A study on drug utilization pattern of anticoagulants in post-cardiac surgeries at a tertiary care hospital

Background: The study is being carried out mainly to understand the prevention of coagulation of blood after a patient undergoing various types of cardiac surgeries, using different anticoagulation therapies suitable to particular types of cardiac surgery. This study was conducted to know the types of anticoagulants prescribed to patients who have undergone different types of cardiac surgeries along with the prescribed anticoagulants. Methods: The study method used was a retrospective and prospective observational study carried out on 50 patients who underwent cardiac surgeries in the department of cardiology and medicine. Results: A total of 50 patients were enrolled for this study who satisfied the inclusion criteria, out of which 64% of patients were males, and 36% were females. The highest number of patients were found to be in between the age group of 61-70 yrs (34%), whereas age group between 51-60 yrs (28%), age group 71 and above (18%), 41-50 (14%), 21-30 yrs (4%) and 18-20 yrs (2%) respectively. Most of the patients had undergone Coronary Artery bypass grafting. It was seen that the highest Anticoagulant being prescribed was Heparin in most of the post-cardiac surgeries. Whereas drugs like dalteparin, acenocoumarol, and warfarin were prescribed the majority in valvular heart surgeries. Conclusions: Various cardiac surgeries were taken into consideration for the study. The most common anticoagulants prescribed were heparin, dalteparin, acenocoumarol, and warfarin in coronary artery bypass surgery and valvular heart surgeries respectively.

A systematic review and meta-analysis on outcomes ofvalvular heart surgery in Africa.

The prevalence of valvular heart diseases remain considerably high in Africa, largely but not solely due to rheumatic heart disease. Valvular heart surgeries have emerged as the cornerstone in their management. While several studies have reported data on outcomes following heart valve surgery in many developed countries, there is a staggering paucity of data and evidence reporting the outcomes in the Africa population. The aim of this study is to report the perioperative outcomes following valvular heart surgery in Africa. The Preferred Reporting Items for Systematic Reviews and Meta-analysis guideline was utilized. Electronic searches were performed using PubMed, African journal online, and Research gate from inception to June 2023. The primary endpoints were overall mortality and 30-day mortality, and secondary endpoints included postoperative complications, length of hospital, and intensive care stays. The outcome data were pooled together and analyzed with the random effect model for proportions and mean for meta-analysis using the R software. This systematic review identified 31 studies that fulfilled the study eligibility criteria and all were observational studies. The countries in which these studies were carried out include South Africa, Ethiopia, Egypt, Mali, Rwanda, Nigeria, Cameroon, Ghana, Senegal, Tanzania, and Kenya. Statistical analysis reported a pooled overall mortality of 10.48% and a pooled 30-day mortality of 4.59%. Several obstacles, such as lack of financial resources and inadequate infrastructure, continue to impede valvular heart surgery practice in many parts of Africa. Future studies need to focus on identifying factors associated with this poor early mortality.

Prognostic implications of iron deficiency and supplementation in patients undergoing valvular heart surgery

Abstract Background Iron deficiency is common in patients with cardiovascular diseases, present in up to 60% of patients with coronary artery disease, heart failure, or pulmonary hypertension. Its role in valvular heart disease, including its prevalence, determinants, and prognostic implications, remains unclear. Purpose The present study aimed to evaluate the prognostic significance of iron deficiency in patients undergoing valvular heart surgery. Methods Pre-operative haematology and iron profiles were retrospectively collected in all patients undergoing valvular heart surgery in Hong Kong between 2010 and 2021. Iron deficiency was defined referencing the ESC 2021 guidelines as a ferritin level &amp;lt;100 ng/mL or a transferrin saturation &amp;lt;20% with a ferritin level of 100 to 299 ng/mL. Logistic regression analyses were conducted to determine variables associated with guideline-defined iron deficiency. Stepwise Cox proportional hazards regression was applied to identify predictors of 5-year mortality. The impact of iron supplementation on outcomes was estimated in iron-deficient patients, modelled by inverse probability of treatment-weighted logistic regression. Results Our study included 578 patients; the median age was 62 (interquartile range 54-70) years, and 47.4% were males. Iron deficiency was present in 324 (56.1%) patients. Independent correlates of iron deficiency were age, male sex, diabetes mellitus, atrial fibrillation, heart failure, diuretics and warfarin use, aortic stenosis, and tricuspid regurgitation (Table 1). Death from any cause occurred in 99 patients over five years of follow-up, of which 45 were due to cardiovascular events. Iron deficiency was associated with a two- to three-fold excess risk of all-cause (hazard ratio [HR] 1.89, 95% CI 1.23-2.90; P = 0.004) and cardiovascular mortality (HR 2.84, 95% CI 1.23-2.90; P = 0.004). Results were consistent in multivariable models incorporating comorbidities, medications, type of valvular intervention, and cardiac surgery risk-scoring systems, even after adjustment for haemoglobin levels (Table 2). For individual components of the guideline criteria, transferrin saturation &amp;lt;20% and ferritin &amp;lt;300 ng/mL were associated with worse all-cause and cardiovascular mortality. Among 324 patients with iron deficiency, 61 (18.8%) received iron supplementation before valvular surgery. Iron supplementation was associated with a 58% lower risk of death in multivariable models with IPTW (HR 0.42; 95% CI, 0.19–0.99; P = 0.047). Conclusions In patients undergoing valvular surgery, iron deficiency is associated with worse survival. This elevated risk may be mitigated by iron supplementation before valvular surgery.Table 1Table 2

Risk stratification model integrating nutritional and inflammatory factors for predicting 1-year mortality after valvular heart surgery: a retrospective cohort study.

Existing risk-scoring systems for cardiac surgery include only standard preoperative factors, without considering nutritional and inflammatory status or intraoperative factors. The objective of this study was to develop a comprehensive prediction model for mortality incorporating nutritional, inflammatory, and perioperative factors in patients undergoing valvular heart surgery. In this retrospective review of 2,046 patients who underwent valvular heart surgery, Cox and LASSO regression analyses were performed to identify independent prognostic factors of 1-year postoperative mortality among various perioperative factors known to affect prognosis, including objective nutritional and inflammatory indices. A novel nomogram model incorporating selected prognostic factors was developed, and its discrimination ability was evaluated using the C-index. The model was validated in internal and external cohorts. The 1-year mortality rate after valvular heart surgery was 5.1% (105 of 2,046 patients) and was significantly associated with several preoperative objective inflammatory and nutritional indices. Cox and LASSO analyses identified the following five independent prognostic factors for mortality: monocyte-to-lymphocyte ratio (an objective inflammatory index), EuroSCORE II, Controlling Nutritional Status score, cardiopulmonary bypass time, and number of erythrocyte units transfused intraoperatively. Our nomogram model incorporating these five factors had a C-index of 0.834 (95% CI 0.791-0.877), which was higher than that of EuroSCORE II alone (0.744, 95% CI 0.697-0.791) (P<0.001). The nomogram achieved good discrimination ability, with C-indices of 0.836 (95% CI 0.790-0.878) and 0.727 (95% CI 0.651-0.803) in the internal and external validation cohorts, respectively, and showed well-fitted calibration curves. A nomogram model incorporating five inflammatory, nutritional, and perioperative factors, as well as EuroSCORE II, was a better predictor of 1-year mortality after valvular heart surgery than EuroSCORE II alone, with good discrimination and calibration power for predicting mortality in both internal and external validation cohorts.

Improved clinical outcomes following introduction of an attending intensivist for patients admitted to the cardiac surgical intensive care unit after valvular heart surgery: a single-center experience.

Although numerous studies have documented the improved clinical outcomes of patients undergoing cardiac surgery following introduction of attending intensivist, most of these studies included heterogeneous patient populations. We aimed to investigate the impact of an attending intensivist on the clinical outcomes of patients admitted to the cardiac surgical intensive care unit (CSICU) following valvular heart surgery. Patients who underwent valvular heart surgery between January 2007 and December 2012 (control group, n=337) were propensity matched (1:1) between January 2013 and June 2017 (intensivist group, n=407). During the propensity score matching analysis, 285 patients were extracted from each group. Patients in the intensivist group underwent mechanical ventilation for a significantly shorter time than those in the control group (21.8±69.8 vs. 39.2±115.3 hours, P=0.021). More patients were extubated within 6 hours in the intensivist group than in the control group (53.7% vs. 42.8%, P=0.015). The incidence of ventilator-associated pneumonia (1.4% vs. 4.9%, P=0.031), cardiac arrest due to cardiac tamponade associated with post-cardiotomy bleeding (0.4% vs. 3.9%, P=0.002), and acute kidney injury (2.8% vs. 7.7%, P=0.011) in the intensivist group was significantly lower than that in the control group. The 30-day mortality rate of the intensivist group was significantly lower than that of the control group (2.1% vs. 6.7%, P=0.015). Critical care provided in the CSICU staffed by an attending intensivist is associated with a lower 30-day mortality rate and reduced incidence of postoperative complications.

Study of predictors of low cardiac output syndrome after cardiac valve surgery

Objective: Low cardiac output syndrome (LCOS) is defined as a decrease in cardiac index (CI) &lt;2.0L/min/m2 and systolic blood pressure &lt;90mmHg, accompanied by signs of a tissue hypoperfusion (cool peripheries, clammy skin, altered mental status, reduced urine output, elevated serum lactate levels) and the need for medication or mechanical circulatory support to improve hemodynamics [4,7]. LCOS is one of the serious complications after open cardiac surgery with a rate of 2-14% depending on the patient and the risk of death increases 12-25 times [3]. Besides modern equipment, early detection and timely treatment reduce mortality as well as increase myocardial recovery. LCOS prognostic factors play an important role. The aim of this study is to identify the prognostic signs of LCOS after valvular surgery.&#x0D; Subjects and methods: A cross-sectional descriptive study on patients undergoing valvular heart surgery at the Cardiovascular Anesthesiology Department - Cardiovascular Center - Hue Central Hospital from February 2022 to July 2022. LCOS is the dependent variable and the independent variable was divided into three groups before surgery, during surgery and after surgery. The data were processed by software R4.2.2. Using univariate logistic regression to identify independent prognostic factors. &#x0D; Results: A study on 60 patients after heart valve surgery showed that: LCOS after heart valve surgery has a rate of 28.3% with an average time of 5.88 hours after surgery. Through univariate logistic regression analysis, the results found independent prognostic factors including: EF &lt;=40% at preoperative time points (OR=12.9, 95%CI 1.73 – 26.5), EF 0h (OR) =2.3, 95%CI 2.4-8.9), EF 4h (OR=2.9, 95%CI 1.9-6.7), EF 24h (OR=1.9, 95%CI 1.5-9.5), lactate at 0h postoperative time (OR=1.81, 95%CI 1.25-2.8), 4h (OR=1.41, 95%CI 1.13-1.85), 8h (OR=1.38, 95%CI 1.14-1.73), 12h (OR=1.35, 95%CI 1.11-1.72), creatinine at 24 h after surgery (OR=1.02, 95%CI 1.01-1.04), time to extracorporeal circulation (OR=1.02, 95%CI 1.02-1.04), time to clamp aorta (OR=1.2, 95%CI 1.1-1.2).[1]&#x0D; Conclusion: Low cardiac output syndrome is one of the serious complications after heart valve surgery, early detection and timely treatment reduce the risk of death for patients. The study showed that many factors before, during and after surgery are independent prognostic factors for LCOS after surgery.

Cardioprotective effect of propofol in cardioplegia compared to systemic propofol in heart valves surgery; a randomized controlled trial

BackgroundMyocardial protection is still a focus of ongoing research. Propofol is used widely during the induction of anaesthesia in cardiac surgery. So, this triggers us to investigate the cardioprotective effect of the propofol when added to the cardioplegia compared to systemic propofol by measuring the troponin T level.MethodsThis clinical randomized controlled trial was carried out on 150 patients operated for elective valvular heart surgery. Patients were assigned into three equal groups: Group 1: received propofol in the cardioplegia, Group 2: received propofol injection in the aortic line before and after the aortic cross-clamp, and Group 3 (control group): patients without propofol in the cardioplegia or aortic line. All patients were subjected to full medical histories, physical examinations, routine tests, and echocardiography. Cardiac troponin T was measured before surgery and 4 times postoperatively.ResultsIn group 1, there was a significant improvement in troponin T level at the last reading compared with the control group (mean ± SD. of group 1 was 246.4 ± 131.4, mean ± SD. of group 3 was 317.0 ± 117.9, p = 0.031), denoting propofol's cardioprotective effect when added as a cardioplegia additive. In group 2, there was a significant improvement of troponin T level at the last reading compared with the group 1 and control group (mean ± SD. of group 2 was 202.54 ± 156.03, mean ± SD. of group 3 was 317.0 ± 117.9, p < 0.001), denoting propofol's more cardioprotective effect when used systemically during cardiopulmonary bypass than when added as a cardioplegia additive.ConclusionsIn valvular cardiac surgery, propofol has an additional cardioprotective effect and a superior cardiac outcome when administered systematically during cardiopulmonary bypass rather than added to cardioplegia.Trial registrationPan African Clinical Trials Register PACTR201907764652028. Registered on 01 July 2019, retrospectively registered, https://pactr.samrc.ac.za/ TrialDisplay.aspx?TrialID = 5726.

Review of current status of cardiovascular and thoracic surgery in Nepal: An analysis from collection of institutional database.

Data collected from various institutions around the country was analyzed to assess the current status of cardiovascular and thoracic surgery in the country. We collected data from institutions performing cardiovascular and thoracic surgery from all over the country through direct correspondence for the year 2019. Individual institution data on the number of surgeries performed for cardiac, vascular, and thoracic surgery and its outcome in terms of mortality were compiled. The data were further evaluated depending on the type of procedures performed. Overall, a total of 2264 cardiac surgeries were performed in the country in the year 2019. The majority of the surgeries were for valvular heart surgery accounting for 34.3%, followed by congenital surgeries (32.8%) and surgeries for coronary artery disease (25.9%). A total of 649 thoracic surgeries were documented, which is probably marginally less than the actual numbers because we were unable to include an additional few institutions performing low-volume or isolated thoracic procedures in this report. A total of 852 vascular procedures were performed in the country, which is probably underreported. The mortality rates for complex congenital procedures were higher than those reported in the literature and that of adult procedures such as valvular heart disease and coronary artery disease similar to literature. We evaluated the recent status of cardiovascular and thoracic surgery in the country with respect to the type of procedures and the postoperative outcomes.

PO-01-020 PERI-OPERATIVE AMIODARONE PROPHYLAXIS IN CARDIOVASCULAR SURGERY: IMPACTS ON POST-OPERATIVE LENGTH OF STAY ACCORDING TO PROCEDURE TYPES

Post-operative Atrial Fibrillation (POAF), occurring in nearly 20-50 percent of cardiovascular surgery (CVS) patients, is associated with prolonged hospitalization and excess costs of care. Peri-operative Amiodarone prophylaxis has been an effective strategy to reduce the incidence of POAF. A retrospective evaluation of the impact of Amiodarone prophylaxis on post-operative length of hospital (LOS) stay, according to CVS procedure types. Hospitalization information was available for 2704 consecutive CVS patients at a single tertiary care centre (2013-2016). CVS included standalone, or combined procedures that involved: valvular heart surgery (VHS), coronary artery bypass graft (CABG), and other miscellaneous procedures (e.g. ascending aorta replacement, endarterectomy). Hierarchical linear regression was used to evaluate the impact of Amiodarone prophylaxis on LOS, adjusted for demographic and clinical characteristics. Among the 2704 patients, there were 866 (32.0%) cases of POAF. LOS, was significantly longer in patients with POAF (+2.78 days, p<0.001). LOS was 1.62 days shorter in patients who received Amiodarone prophylaxis (p=0.007). Within all operative categories, LOS was shorter in patients receiving amiodarone prophylaxis, though statistical significance was only observed in VHS (including VHS + other) and VHS + CABG procedure types. Specifically, Amiodarone prophylaxis was associated with shorter LOS among: patients who had CABG but not VHS (8.26 versus 9.45 days, p= 0.29), patients who had VHS but not CABG (7.62 versus 11.02 days, p<0.001), patients undergoing VHS + CABG (9.36 vs. 12.41 days, p<0.03), and patients undergoing VHS + CABG + other (13.54 versus 15.09 days, p= 0.74). After adjusting for demographic-clinical covariates in a hierarchical multiple regression, Amiodarone prophylaxis remained an independent predictor of shorter LOS (b= -2.3 [-3.7, -0.93], p= 0.001). Other independent predictors included: left atrial diameter of >40 mm (b= 1.7 [0.90, 2.85], p< 0.001), female sex (b= 1.4 [0.56, 2.19], p= 0.001), history of heart failure (b= 2.1 [0.94, 3.30], p< 0.001), and CVS involving VHS + CABG (b= 1.4 [0.15, 2.67], p= 0.03), and VHS + CABG + other (b= 5.1 [2.51, 7.72], p<0.001). Amiodarone prophylaxis is independently associated with significantly shorter LOS following CVS.