Specialized Cardiology Center Research Articles

Burden, predictors and short-term outcomes of peripartum cardiomyopathy in a black African cohort.

BackgroundPeripartum cardiomyopathy (PPCM) is an idiopathic cardiomyopathy presenting with acute heart failure during the peripartum period. It is common in patients of African ancestry. Currently, there is paucity of data on the burden, predictors and outcomes of PPCM in Uganda. This study aimed to investigate the prevalence, predictors and six-month outcomes of PPCM in an adult cohort attending a tertiary specialised cardiology centre in Kampala, Uganda.MethodsThis study consecutively enrolled 236 women presenting with features of acute heart failure in the peripartum period. Clinical evaluation and echocardiography were performed on all the enrolled women. PCCM was defined according to recommendations of the Heart Failure Association of the European Society of Cardiology Working Group on PPCM. Poor outcome at six months of follow-up was defined as presence of any of the following: death of a mother or her baby, New York Heart Association (NYHA) functional class III-IV or failure to achieve complete recovery of left ventricular function (left ventricular ejection fraction ≤55%).ResultsThe median age, BMI and parity of the study participants was 31.5 (25.5–38.0) years, 28.3 (26.4–29.7) and 3 (2–4) respectively. The prevalence of PPCM was 17.4% (n = 41/236). Multiple pregnancy was the only predictor of PPCM in this study population (OR 4.3 95% CI 1.16–16.05, p = 0.029). Poor outcome at six-months was observed in about 54% of the patients with PPCM (n = 4, 9.8% in NYHA functional class III-IV and n = 22, 53.7% with LVEF <55%). No maternal or foetal mortality was documented.ConclusionPPCM is relatively common in Uganda and is associated with multiple pregnancy. Poor outcomes especially absence of complete recovery of left ventricular function are also common. Large studies to further investigate long-term maternal and foetal outcomes in Uganda are justified.

The frequency of familial hypercholesterolemia amongst patients in the outpatient clinic of the tertiary specialized cardiology center in Kyrgyzstan

BackgroundFamilial hypercholesterolemia (FH) is frequently underdiagnosed. Prevalence of the FH in Kyrgyzstan is unknown. Aimto investigate the prevalence of FH amongst patients in the outpatient settings of the tertiary cardiologic center in Kyrgyzstan. MethodsRetrospective observational study was conducted using the database of the laboratory of biochemistry and electronic database of outpatient department of the National Center of Cardiology and internal diseases. Patient with the level of total cholesterol (TC) ≥7,5 mmol/l and/or low density lipoprotein cholesterol (LDL-C) ≥ 4,9 mmol/l without signs of secondary hyperlipidemia were included in the analysis. FH was defined using Dutch Lipid Clinic Network criteria. Resultsaccording to the laboratory database levels of TC and LDL-C was conducted in 8281patiens and 525 of them had a high lipid levels. After exclusion of patients with secondary hyperlipidemia, high level of triglycerides and pregnant women – 91 patients were included in the analysis. Among them the definite FH was revealed in 2 (2,2%) patients, probable FH - in 6 (6,6%), and possible in 76 (83,5%), and in 7,7% there were no signs of FH. ConclusionFrequency of potential FH (definite and probable) in our analysis was low. To understand the real prevalence of FH in a Kyrgyz population epidemiological study is needed.

Pulse wave velocity reference values in 3,160 adults referred to a hypertension clinic for 24-hour ambulatory blood pressure monitoring

ABSTRACTBackground: Carotid-femoral pulse wave velocity (PWV) is a direct measure of aortic stiffness used in the stratification of cardiovascular risk. Its clinical application in Latin America has been limited by the absence of reference values. The objective of this study was to establish PWV reference values among adults referred to a specialized cardiology center for 24-hour ambulatory blood pressure monitoring (ABPM) in Medellín, Colombia.Methods: A descriptive study of 3,160 records of adult (older than 18 years) patients without pharmacological treatment assessed for PWV using a Mobil-O-Graph® 24-hour PWA device (IEM, Stolberg, Germany) and 24-hour ABPM with hemodynamic parameters based on suspected hypertension or hypotension was conducted. Patient records were categorized by decade of age and sub-divided based on the following 24-hour ABPM categories: normal (< 130/80 mmHg), grade I hypertension (between 130–150/80–90 mmHg), and grade II hypertension (> 150/90 mmHg).Results: PWV increased with age (r = 0,894; p < 0,001) and blood pressure category (ρ = 0,081; p < 0,001); the age-related increase was more pronounced among the patients in the higher blood pressure categories. Measures of central tendency and dispersion regarding PWV are presented, and reference values are proposed from the 90th percentile based on the age and 24-hour ABPM categories.Conclusions: PWV is directly related to age and blood pressure and can be predicted using a simple equation that includes these two variables. To stratify the cardiovascular risk of patients and make clinical decisions, the 90th percentile based on the age and 24-hour ABPM categories is recommended as a cut-off.

Factores asociados a mortalidad a 30 días en pacientes mayores de 75 años llevados a cateterismo cardiaco

Coronary disease is the main cause of death in the world and, in that sense, elderly population are the most affected. Parallel to the growing increase in the population over 75 years, security and efficacy of the percutaneous coronary intervention is questioned in regards to its morbidity and mortality. A cross-sectional study was conducted with patients over 75 years who underwent cardiac catheterization due to acute myocardial infarction with or without ST elevation, unstable angina or left ventricular ejection fraction lower than 40%, in a specialized Cardiology Center in Medellín, Colombia, Cumulative incidence was estimated at 30 days and variables related to mortality were explored. Results399 individuals were analyzed, with an average age of 80 years (RIQ 6), out of whom 20 died during the hospitalization, and a total of 24 died during the 30 days after the cardiac catheterization, with an estimated mortality at 30 days of 6% (CI 95%, 3.5-8.5). The mean hospital stay was 7 days (range 0-64 days). A relationship between mortality and female gender was found with a prevalence rate (PR) of 2.61 (p=0.017), with infarction posterior to cardiac catheterization PR 9.77 (p<0.001) and mechanical complication during the catheterization PR 5.039 (p=0.003). Also, a PR of 9.25 (p<0.001) in patients with acute myocardial infarction Killip III and IV. Patients with fatal outcome had a mean pulmonary artery systolic pressure (PASP) of 40mm Hg and a mean ejection fraction of the left ventricular ejection fraction (LVEF) of 40%, whereas those who survived had a mean PASP of 36mm HG and a mean LVEF of 47%. ConclusionCardiac catheterization and coronary intervention have a relatively low mortality rate in the first 30 days and it is comparable to younger individuals who underwent this procedure. Factors associated to an increase in mortality were: score of III or IV in the Killip-Kimball scale, decreased ejection fraction, reinfarction during hospitalization, mechanical complication during cardiac catheterization and female gender.These results suggest that percutaneous coronary intervention can be a safe and efficient method in patients over 75 years of age.

EVALUATION OF THE REGULARITY OF ANTIHYPERTENSIVE DRUGS USAGE AS A COMPONENT OF TREATMENT ADHERENCE IN OUTPATIENTS OF A SPECIALIZED CARDIOLOGY CENTER

High adherence to blood pressure (BP) medical correction determines clinical and socioeconomic efficacy of antihypertensive treatment. Separate components of adherence are to be studied, including regularity of drugs intake and reasons for non-compliance with medical recommendations in different categories of patients. Aim. Evaluation of antihypertensive drugs (AHD) intake regularity (as a component of treatment adherence) and factors it is influenced by in hypertensive patients who had for the first time visited a specialized cardiology center during the 6-month follow-up after the primary consultation. Material and methods. First, a number of hypertensive patients who had visited a cardiologist of one of Moscow’s district cardiology clinics for the first time in 2010 (n=1766) had formed a sample of the study participants. The expert cards were filled out in accordance with the primary medical documentation data. The second step was conducted 6 months after the first visit by a phone survey with the completion of questionnaires (n=1419). Results. Majority of respondents (74.9%) had been taking AHD regularly 6 months after the primary consultation and 16.2% of the patients had been using them occasionally. 8.9% of the respondents completely refused to control hypertension with drugs. Respondents of male sex (OR=1.4), with poor BP self-control in home settings (OR=2.5), unable to get drugs under the medicine assistance scheme (OR=1.8), those without coronary heart disease (OR=1.9), with hypertension duration less than 5 years (OR=1.9), with changes in antihypertensive therapy regimen as compared to the one recommended by a cardiologist (OR=1.5), those who had 1-2 drugs in the treatment regimen at the moment of the survey (OR=2.4) and patients who had no fixed drug combinations in the treatment scheme (OR=1.4) were shown to have significantly higher probability of irregular AHD intake or complete treatment refusal. Conclusion. Outpatients of the specialized cardiology center are characterized by rather high treatment adherence by AHD intake regularity. We have revealed a number of factors that significantly correlate with reduced antihypertensive treatment adherence. These factors must be taken into account at treatment regimen selection and patients’ follow-up.

Access to myocardial revascularization procedures: Closing the gap with time?

BackgroundEarly access to revascularization procedures is known to be related to a more favorable outcome in myocardial infarction (MI) patients, but access to specialized care varies widely amongst the population. We aim to test if the early gap found in the revascularization rates, according to distance between patients' location and the closest specialized cardiology center (SCC), remains on a long term basis.MethodsWe conducted a population-based cohort study using data from the Quebec's hospital discharge register (MED-ECHO). The study population includes all patients 25 years and older living in the province of Quebec, who were hospitalized for a MI in 1999 with a follow up time of one year after the index hospitalization. The main variable is revascularization (percutaneous transluminal coronary angioplasty or a coronary artery bypass graft). The population is divided in four groups depending how close they are from a SCC (<32 km, 32–64 km, 64–105 km and ≥105 km). Revascularization rates are adjusted for age and sex.ResultsThe study population includes 11,802 individuals, 66% are men. The one-year incidence rate of MI is 244 individuals per 100,000 inhabitants. At index hospitalization, a significant gap is found between patients living close (< 32 km) to a SCC and patients living farther (≥32 km). During the first year, a gap reduction can be observed but only for patients living at an intermediate distance from the specialized center (64–105 km).ConclusionThe gap observed in revascularization rates at the index hospitalization for MI is in favour of patients living closer (< 32 km) to a SCC. This gap remains unchanged over the first year after an MI except for patients living between 64 and 105 km, where a closing of the gap can be noticed.

Spatial variation in the management and outcomes of acute coronary syndrome

BackgroundRegional disparities in medical care and outcomes with patients suffering from an acute coronary syndrome (ACS) have been reported and raise the need to a better understanding of links between treatment, care and outcomes. Little is known about the relationship and its spatial variability between invasive cardiac procedure (ICP), hospital death (HD), length of stay (LoS) and early hospital readmission (EHR). The objectives were to describe and compare the regional rates of ICP, HD, EHR, and the average LoS after an ACS in 2000 in the province of Quebec. We also assessed whether there was a relationship between ICP and HD, LoS, and EHR, and if the relationships varied spatially.MethodsUsing secondary data from a provincial hospital register, a population-based retrospective cohort of 24,544 patients hospitalized in Quebec (Canada) for an ACS in 2000 was built. ACS was defined as myocardial infarction (ICD-9: 410) or unstable angina (ICD-9: 411). ICP was defined as the presence of angiography, angioplasty or aortocoronary bypass (CCA: 480–483, 489), HD as all death cause at index hospitalization, LoS as the number of days between admission and discharge from the index hospitalization, and EHR as hospital readmission for a coronary heart disease ≤30 days after discharge from hospital. The EHR was evaluated on survivors at discharge.ResultsICP rate was 43.7% varying from 29.4% to 51.6% according to regions. HD rate was 6.9% (range: 3.3–8.2%), average LoS was 11.5 days (range: 7.5–14.4; median LoS: 8 days) and EHR rate was 8.3% (range: 4.7–14.2%). ICP was positively associated with LoS and negatively with HD and EHR; the relationship between ICP and LoS varied spatially. An increased distance to a specialized cardiology center was associated with a decreased likelihood of ICP, a decrease in LoS, but an increased likelihood of EHR.ConclusionThe main results of this study are the regional variability of the outcomes even after accounting for age, gender, ICP and distance to a cardiology center; the significant relationships between ICP and HD, LoS and EHR, and the spatial variability in the relationships between ICP and LoS.