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BACKGROUND The circadian clock influences a number of cardiovascular (patho)physiological processes including the incidence of acute myocardial infarction. A circadian variation in infarct size has recently been shown in rodents, but there is no clinical evidence of this finding. OBJECTIVE To determine the impact of time-of-day onset of ST segment(More)
BACKGROUND The effect of β-blockers on infarct size when used in conjunction with primary percutaneous coronary intervention is unknown. We hypothesize that metoprolol reduces infarct size when administered early (intravenously before reperfusion). METHODS AND RESULTS Patients with Killip class II or less anterior ST-segment-elevation myocardial(More)
INTRODUCTION AND OBJECTIVES Tako-tsubo syndrome produces a variable degree of transient left ventricular dysfunction. Our objective was to determine the short- and long-term prognosis of this syndrome, the incidence of and risk factors for the development of heart failure, and the influence on heart failure on the long-term outcome in our patient(More)
The main risk factor for contrast nephropathy is the presence of poor renal function. Plasma creatinine level is not a reliable measure of renal function as its value could lie within the normal range despite the presence of significant nephropathy. The purpose of this study was to evaluate the creatinine clearance rate as a predictor of contrast(More)
We appreciate the interest of and comments by Drs Argulian and Messerli on our recently published study. Defining inclusion and exclusion criteria, along with dose selection of the administered pharmacological therapy, is critical in the early stages of a clinical trial design. The scientific method strongly recommends performing a profound bibliographic(More)
BACKGROUND Infarct size predicts post-infarction mortality. Oral β-blockade within 24 hours of a ST-segment elevation acute myocardial infarction (STEMI) is a class-IA indication, however early intravenous (IV) β-blockers initiation is not encouraged. In recent magnetic resonance imaging (MRI)-based experimental studies, the β(1)-blocker metoprolol has been(More)
lation of cardiac contractile performance via protein kinase C. Cardiomyocyte-specific vitamin D receptor gene knockout causes cardiac hyper-trophy. Activated vitamin D attenuates left ventricular abnormalities induced by dietary sodium in Dahl salt-sensitive animals. treatment and prevention of infectious diseases: a systematic review of random-ized(More)