Wissam Gharib

Effect of intensive lifestyle changes on endothelial function and on inflammatory markers of atherosclerosis.

Intensive lifestyle changes have been shown to regress atherosclerosis, improve cardiovascular risk profiles, and decrease angina pectoris and cardiac events. We evaluated the influence of the Multisite Cardiac Lifestyle Intervention Program, an ongoing health insurance-covered lifestyle intervention conducted at our site, on endothelial function and inflammatory markers of atherosclerosis in this pilot study. Twenty-seven participants with coronary artery disease (CAD) and/or risk factors for CAD (nonsmokers, 14 men; mean age 56 years) were enrolled in the experimental group and asked to make changes in diet (10% calories from fat, plant based), engage in moderate exercise (3 hours/week), and practice stress management (1 hour/day). Twenty historically (age, gender, CAD, and CAD risk factors) matched participants were enrolled in the control group with usual standard of care. At baseline endothelium-dependent brachial artery flow-mediated dilatation (FMD) was performed in the 2 groups. Serum markers of inflammation, endothelial dysfunction, and angiogenesis were performed only in the experimental group. After 12 weeks, FMD had improved in the experimental group from a baseline of 4.23 + or - 0.13 to 4.65 + or - 0.15 mm, whereas in the control group it decreased from 4.62 + or - 0.16 to 4.48 + or - 0.17 mm. Changes were significantly different in favor of the experimental group (p <0.0001). Also, significant decreases occurred in C-reactive protein (from 2.07 + or - 0.57 to 1.6 + or - 0.43 mg/L, p = 0.03) and interleukin-6 (from 2.52 + or - 0.62 to 1.23 + or - 0.3 pg/ml, p = 0.02) after 12 weeks. Significant improvement in FMD, C-reactive protein, and interleukin-6 with intensive lifestyle changes in the experimental group suggests > or = 1 potential mechanism underlying the clinical benefits seen in previous trials.

Exercise reveals impairments in left ventricular systolic function in patients with metabolic syndrome

•  What is the central question of this study? Metabolic syndrome (MetS) is associated with a threefold increase in risk of cardiovascular disease mortality, which may be mediated, in part, by impaired left ventricular systolic function. The severity of left ventricular and arterial dysfunction during dynamic exercise in individuals with MetS without diabetes and/or overt cardiovascular disease has not previously been explored. •  What is the main finding and its importance? Cardiovascular function was characterized at rest and during peak exercise using echocardiography and gas exchange. During exercise, individuals with MetS displayed impaired left ventricular contractility, a blunted arterial–ventricular coupling reserve and limited aerobic capacity. These findings provide insight into the pathophysiological changes that may occur to predispose individuals with MetS to an increased risk of cardiovascular disease.

Differential Diagnosis of Acute Pericarditis From Normal Variant Early Repolarization and Left Ventricular Hypertrophy With Early Repolarization: An Electrocardiographic Study

Background:Differentiation of ST-segment elevation on electrocardiogram (ECG) from acute pericarditis (AP), normal variant early repolarization (ER) and early repolarization of left ventricular hypertrophy (ERLVH) can be problematic. Hence, the authors evaluated the accuracy of the ST/T ratio in ECG to more optimally differentiate between AP, ST-segment elevation, ER and ERLVH. Methods:Between September 2006 and July 2010, 80 patients were enrolled in this study consisting of 25 individuals with AP, 27 with ER and 28 with ERLVH. Each ECG was analyzed in a systematic manner including the measurement of PR interval, QRS duration, QT-segment duration, PR-segment deviation, ST-segment deviation and the height of T wave. The ratio of the height of ST segment to the height of T wave was measured in leads I, II, III, aVF and V2 through V6. Results:The mean ages of the patients with AP, ER and ERLVH were 32 ± 16.5, 36 ± 15.4 and 53 ± 16 years, respectively. The ratio of the amplitude of ST segment to the amplitude of the T wave in leads I, V4, V5 and V6 proved to be a significant discriminator at a value of ≥0.25 (P < 0.05 for all). Conclusions:Leads I, V4, V5 and V6 can all be used to differentiate AP from ER and ERLVH. When ST elevation is present in lead I, the ST/T ratio has the best predictive value (0.82) to more accurately discriminate between AP, ER and ERLVH.

Comorbidities of Chronic Complete Right Bundle Branch Block and Correlations With Coronary Angiographic Findings

Background This is a prospective, observational review of medical records to investigate the associated comorbidities and angiographic anatomy in patients with chronic right bundle branch block (RBBB). Methods The analyses of 32,345 consecutive electrocardiograms (EKGs) between October 2010 and January 2012 revealed 583 patients with RBBB. The common comorbidities associated with RBBB were hypertension (82%), diabetes (42%), coronary artery disease (CAD) (44%), valvular heart disease (aortic—16% and mitral—17%) and pulmonary disease (33%). Demographic data including age, sex, EKG and associated comorbidities were analyzed from the medical records. Coronary angiograms within 6 months of EKG in patients with RBBB were available for 184 patients and were accordingly analyzed for significant obstructive CAD. Results In all, 33 patients had single‐vessel disease, 52 patients had 2‐vessel disease, and 87 patients had multivessel disease whereas 12 patients had no significant disease. Left anterior descending artery was the most frequent vessel involved (72%) followed by left circumflex (58%) and right coronary artery (53%). Conclusions In conclusion, in chronic RBBB, wherever the angiograms were available, CAD predominantly involved left anterior descending artery. Most common associated comorbidities in chronic RBBB were systemic hypertension and CAD.

THE FEASIBILITY AND SAFETY OF SAME DAY DISCHARGE FOR ALL COMERS AFTER ELECTIVE PERCUTANEOUS CORONARY INTERVENTIONS

Background: The safety of same day discharge (SDD) after percutaneous coronary interventions (PCI) has been demonstrated, but was only allowed in patients meeting strict arbitrary criteria. We aim to evaluate the feasibility and safety of SDD following elective PCI in all comers. Methods: Patients

ENHANCED EXTERNAL COUNTER PULSATION IMPROVES ENDOTHELIAL FUNCTION, INFLAMMATORY MARKERS AND DEPRESSION.

Background: Endothelial dysfunction is the earliest and most important factor in the pathogenesis of atherosclerosis. Inflammation has been shown to contribute to endothelial dysfunction. EECP has been shown to improve endothelial function besides symptomatic benefit in patients with refractory angina. In this patient population, depression has an unfavorable impact on mortality. We evaluated the effect of EECP on endothelial function, inflammatory markers of atherosclerosis and depression.