BACKGROUND Myocardial ischemia attributed to coronary steal may occur in some patients receiving pharmacological coronary vasodilation. ECG ST-segment depression is a marker of myocardial ischemia in these patients, but the factors determining the presence or absence of ischemia are not well known. METHODS AND RESULTS To examine the angiographic, hemodynamic, and scintigraphic determinants of...

Many patients know that the amount of physical activity that provokes angina varies throughout the day. Often relatively little effort is enough early on-towelling down after a shower or taking a short walk to the garage or bus stop-whereas later substantially more vigorous exertion may be undertaken without provoking pain. This "first effort angina," or "warming up phenomenon," appears to be r...

OBJECTIVE To study exercise performance on a treadmill in anemic children. DESIGN Prospective case control study. SETTING Department of Pediatrics and Intensive Care Unit, Department of Medicine, King George's Medical College, Lucknow. SUBJECTS The study population consisted of 41 cases of anemia (10 mild, 21 moderate and 10 severe) and 11 normal age and height matched children aged betwe...

The mechanism of the low temperature oxidation of gaseous acetaldehyde was investigated in the temperature range of 1 50-400?°C. The minor, intermediate and major products were identified and measured quantitatively by sampling directly into the ionization chamber of an MS10-C2 mass spectrometer from the reactor. The formation of H2O, CO, CO2, HCOOH, H2, HCHO, CH3COOH and CH3OH as the major pro...

The cardiovascular responses to combined static-dynamic effort, postprandial dynamic effort and dynamic effort alone were evaluated by upright bicycle ergometry during equilibrium-gated blood pool scintigraphy in 24 men, mean age 59 +/- 8 years, with chronic ischemic heart disease. Combined static-dynamic effort and the postprandial state elicited a peak cardiovascular response similar to that ...

The aim of this study was to provide information on heart rate and blood pressure responses during a 3-week intermittent hypoxia breathing program in COPD patients. Sixteen participants with COPD symptoms were randomly assigned to a hypoxia or control group and completed a 3-week intermittent hypoxia breathing program (five sessions per week, each consisting of three to five breathing cycles, e...

OBJECTIVE Exercise training programs have been proposed as adjuncts to treatment of heart failure. The effects of a 3-month-exercise-training-program with 3 exercise sessions per week were assessed in patients with stable systolic chronic heart failure. METHODS We studied 24 patients with final left ventricle diastolic diameter of 70+/-10mm and left ventricular ejection fraction of 37+/-4%. M...

objective: several studies have shown that chichorium intybus l. (c. intybus) which possesses flavonoid compounds has an effective role in treatment of cardiovascular diseases. contractile dysfunction mostly occurs after acute myocardial infarction, cardiac bypass surgery, heart transplantation and coronary angioplasty. the aim of the present study was to investigate the effect of aqueous extra...