Israel Medical Association Journal

Objectives: To study the effects of purified allicin on the cardiovascular system.

Methods: Spontaneously hypertensive rats treated for 6 weeks with a daily dose of 80 mg/kg/day of purified allicin added to their chow were compared to control rats that were fed regular chow. Weight, systolic blood pressure (SBP), triglycerides, cholesterol, insulin and adiponectin were measured at baseline and at the end of the study.

Results: Allicin had no effect on body weight whereas it reduced SBP significantly from 190 ± 7.5 mmHg to 168 ± 5.7 (P < 0.0001) and triglyceride levels from 96 ± 25 mg/dl to 71 ± 19 (P =0.009). Allicin had no effect on plasma cholesterol, insulin and adiponectin levels.

Conclusions: Allicin lowers blood pressure and triglyceride levels in spontaneously hypertensive rats. This effect is not mediated through weight loss.

Objectives: To investigate the reasons for non-adherence associated with cardiovascular risk factors among Bedouins.

Methods: We identified Bedouin patients with HTN, DM or LMD from medical records and randomly selected 443 high adherent and 403 low adherent patients. Using trained interviewers we conducted in-depth structured interviews regarding knowledge and attitudes to chronic illness and its treatment, health services evaluation, and socio-demographic factors.

Results: The study population included 99 high and 101 low adherent patients. More low adherent patients agreed that traditional therapy can replace prescribed medications for DM, HTN or LMD (47% vs. 26%, P < 0.01), and 10% used only traditional medications. Also, more low adherent patients believed that the side effects of prescribed drugs are actually worse than the disease itself (65% vs. 47%, P < 0.05), and 47% cited this as a reason for discontinuing drug treatment (47% vs. 31%, P < 0.05).

Conclusions: Our findings suggest that in this minority population the basis for non-adherence derives directly from patients' perceptions of chronic disease and drug treatment. A focused intervention should emphasize the importance of early evidence-based drug therapy with open patient-physician dialogue on the meaning of chronic disease and the side effects of prescribed drugs.

Background: The incidence and prevalence of coronary heart disease (CHD) among Bedouins living in the Negev region was very low until the 1960s. During the past 50 years this pattern has changed: in parallel to the changes in lifestyle and nutrition in the Bedouin population, a rapid increase in incidence and mortality from CHD occurred. The relationship between the rise in CHD incidence and the degree of urbanization in this population has not been investigated to date. The study hypothesis was that the prevalence of risk factors and the outcome of myocardial infarction in Bedouins differ between those settled in permanent villages and those remaining in unrecognized villages.

Objectives: To compare the prevalence of cardiovascular risk factors, clinical characteristics, and in-hospital management of a first acute myocardial infarction (AMI) in two Bedouin groups: those residing in permanent villages versus those residing in unrecognized villages.

Methods: We conducted a retrospective analysis of in-hospital data of 352 patients admitted with a first AMI during the period 1997–2003 to Soroka Medical Center, the only medical facility in the region.

Results: There were no differences between the two groups regarding the major cardiovascular risk factors and outcome. A relatively greater number of patients from urban areas underwent catheterization of any sort during their hospitalization (primary, rescue, and risk stratification; P = 0.038). No significant difference was found between the two groups in the type of catheterization performed (P = 0.279).

Conclusions: We found no differences in the clinical characteristics and in-hospital management of patients with AMI between Bedouins residing in permanent villages versus unrecognized villages.

Background: The incidence of cardiovascular disease increases with age, and visits by elderly patients to the outpatient cardiac clinic are becoming more frequent.

Objectives: To characterize cardiovascular pathologies of patients 70 years of age and over who visit the outpatient cardiac clinic.

Methods: We investigated cardiovascular pathologies, risk factors, and medications in new patients over a 2 month period.

Results: The study population comprised 290 patients: 139 (47.9%) were older than 70 years. Among the cardiovascular pathologies, aortic stenosis, angina pectoris, congestive heart failure, s/p coronary artery bypass graft, and stroke were more frequent in the elderly patients than in those under age 70. Among the risk factors for ischemic heart disease, only hypertension was more frequent in the elderly population, whereas fewer in this group were active smokers. The mean number of medications administered was 3.51 ± 1.63 among the elderly patients compared to 1.99 ± 1.71 among the younger ones (P = 0.0001). Beta-blockers were the most frequently used cardiovascular drugs both in the elderly (59.7%) and in the younger patients (43%) (P = 0.0046).

Conclusions: Patients over age 70 represent about half the visits in our outpatient clinic. Their multiple cardiovascular pathologies and therapeutic requirements raise the issue of developing the cardiology service to meet the special needs of geriatric patients.
 

Background: High levels of plasma homocysteine constitute a risk for cardiovascular disease. Physical activity, known to reduce CVD[1] risk, has been related to levels of Hcy[2]. Recently, higher Hcy was shown to be associated with lower cardiovascular fitness in women but not in men.

Objectives: To further explore the relationship between cardiorespiratory fitness and plasma total homocysteine levels in a large cohort of adult males and females.

Methods: This cross-sectional study included 2576 fitness and Hcy examinations in adults (62% males) aged 30–59 years, randomly drawn from a population undergoing a periodic health examination in the Sheba Medical Center's Executive Screening Survey. Blood tests were collected for tHcy[3] and a sub-maximal exercise test was performed to estimate cardiorespiratory fitness. Information on CVD/CVD risk factors (coronary heart disease, cerebrovascular accident, diabetes, hypertension or dyslipidemia) was self-reported.

Results: Mean tHcy plasma levels were 14.4 ± 7.7 and 10.2 ± 3.0 µmol/ml, and mean maximal oxygen uptake 36.5 ± 11.7 and 29 2 ± 9.5 ml/kg/min for males and females, respectively. A multiple regression analysis, adjusting for age, body mass index and CVD/CVD risk factors, showed no association between cardiorespiratory fitness and level of tHcy in males (P = 0.09) or in females (P = 0.62).

Conclusions: In this sample no relationship was found between level of cardiorespiratory fitness and plasma tHcy in men or women. The inconsistency of findings and the small number of studies warrant further research of the association between cardiorespiratory fitness and tHcy, an association that may have clinical implications for the modifications of cardiovascular risk factors.

Background: Endothelial dysfunction is recognized as a major factor in the development of atherosclerosis and it has a prognostic value.

Objectives: To detect the long-term association of peripheral vascular endothelial function and clinical outcome in healthy subjects and patients with cardiovascular disease.

Methods: We prospectively assessed brachial artery flow-mediated dilation in 110 consecutive subjects (46 CVD[1] patients and 64 healthy controls), mean age 57 ± 11 years; 68 were men. After an overnight fast and discontinuation of all medications for ≥ 12 hours, percent improvement in FMD and nitroglycerin-mediated vasodilatation were assessed using high resolution ultrasound.

Results: %FMD[2] but not %NTG[3] was significantly lower in CVD patients (9.5 ± 8.0% vs. 13.5 ± 8.0%, P = 0.012) compared to healthy controls (13.4 ± 8.0% vs. 16.7 ± 11.0%, P = 0.084; respectively). In addition, an inverse correlation between %FMD and the number of traditional CVD risk factors was found among all study participants (r = -0.23, P = 0.015) and healthy controls (r = -0.23, P = 0.036). In a mean follow-up of 15 ± 2 months, the composite CVD endpoints (all-cause mortality, myocardial infarction, hospitalization for heart failure or angina pectoris, stroke, coronary artery bypass grafting and percutaneous coronary interventions) were significantly more common in subjects with FMD < 6% compared to subjects with FMD > 6% (33.3% vs. 12.1%, P < 0.03, respectively).
Conclusions: Thus, brachial artery %FMD provides important prognostic information in addition to that derived from traditional risk factor assessment

Objectives: To assess the prevalence of reversible and treatable cardiovascular risk factors among 26’477 healthy Israeli adults: 23’339 men and 3138 women aged 25-55 years.

Methods: We collected data during routine examinations performed as part of a screening program for Israel Defense Force personnel.

Background: Cardiovascular disease is now well established as a multifactorial disease. In a given individual, the level of cardiovascular risk is due to the interaction between genetic and environmental components. The BIP cohort comprised 3000 patients with cardiovascular disease who were tested for the benefits of bezafibrate treatment. This cohort has the data for the lipid profile of each individual, fibrinogen, Insulin, as well as clinical, demographic and lifestyle parameters

Objectives: To genotype up to 64 variable sites in 36 genes in the BIP cohort. The genes tested in this assay are involved in pathways implicated in the development and progression of atherosclerotic plaques, lipid and homocystein metabolism, blood pressure regulation, thrombosis, rennin-angiotensin system, platelet aggregation, and leukocyte adhesion.

Methods:  DNA was extracted from 1000 Israeli patients from the BIP cohort. A multilocus assay, developed by the Roche Molecular System, was used for genotyping. Allele frequencies for some of the markers were compared to the published frequencies in a healthy population (the French Stanislas cohort, n=1480).

Results: Among the 26 comparable alleles checked in the two cohorts, 16 allele frequencies were significantly different from the healthy French population: ApoE (E3, E2, E4), ApoB (71ile), ApoC (3482T, 455C, 1100T, 3175G, 3206G), CETP (405val), ACE (Del), AGT (235thr), ELAM (128arg); p<0001 and LPL (93G, 291Ser, 447ter); p < 005.

Conclusions: Although a comparable healthy Israeli population study is needed for more precise interpretation of these results, frequency differences in these polymorphic alleles, associated with lipid metabolism, renin-angiotensin system and leukocyte adhesion mechanism, between CVD patients and healthy individuals nevertheless implicate these candidate genes as predisposing for CVD.lic safety.