Silent myocardial ischemia as a potential link between lack of premonitoring symptoms and increased risk of cardiac arrest during physical stress.ation of exercise-induced ventricular ectopic activity with thallium myo-cardial perfusion and angiographic coronary artery disease in stable, low-risk populations. Warm up II: performance changes following active warm up and how to structure the warm...

Background A high resolution real-time phase-contrast MRI flow technique was used to measure flow dynamics in the ascending aorta as well as superior vena cava. MRI technique based on undersampled radial fast low-angle shot acquisitions with phase-sensitive image reconstructions by regularized nonlinear inversion. Normal flow values as well as flow measurements during physiologic stress tests l...

Aneurysm of the sinus of Valsalva that causes dissection of the interventricular septum is an extremely rare entity. In this report we describe a case of aneurysm of the sinus of Valsalva dissecting into the interventricular septum, from the base to mid septum, after aortic valve replacement. After the diagnosis was made by transthoracic echocardiography and magnetic resonance imaging, the pati...

Some of coronary artery anomalies, such as origin of all coronary arteries from three separate ostiums in the right sinus of valsalva, represent a small amount of coronary anomalies. We describe a 63-year-old female patient which coronary angiogram revealed an origin of all coronary arteries from three separate ostiums in the right sinus of valsalva, with significant atherosclerotic plaque at t...

Unruptured right sinus of Valsalva aneurysm that causes severe obstruction of the right ventricular outflow tract is extremely rare. We describe the case of a 47-year-old woman who presented with exertional dyspnea. Upon investigation, we discovered an unruptured right sinus of Valsalva aneurysm with associated right ventricular outflow tract obstruction and a supracristal ventricular septal de...

Sinus of Valsalva aneurysm accounts for only 1% of congenital cardiac anomalies. Sinus of Valsalva aneurysm can cause aortic insufficiency, coronary artery flow compromise, cardiac arrhythmia, or aneurysm rupture. A 44year-old male presented with a 3-month history of palpitation and exertional dyspnea. Cardiac auscultation revealed a grade III/VI ‘‘to and fro’’ murmur along the left sternal bor...

In this report, a brief history of the Valsalva (Valsalva-Weber) maneuver is outlined, followed by an explanation on the use of this approach for the evaluation of cardiac autonomic function based on underlying heart rate changes. The most important methodological and interpretative aspects of the Valsalva-Weber maneuver are critically updated, and some guidelines are established for simple app...

Ten normal male volunteers received either TOO mg alprenolol or placebo in a double-blind randomized trial. Ninety minutes later they performed a standardized Valsalva manoeuvre 40: mmHg airway pressure for 12 seconds. Beat-to-beat measurements were made of heart rate, left ventricular ejection time (LVET), ejection time index (ETI), and' corrected ejection time' (LVET/Vye). After placebo, hear...

objectives comparing the effects of spontaneous pushing in the lateral position with the valsalva maneuver during the second stage of labor on maternal and fetal outcomes. methods inclusion criteria in this randomized clinical trial conducted in iran were as follows: nulliparous mothers, live fetus with vertex presentation, gestational age of 37 - 40 weeks, spontaneous labor, and no complicatio...

BACKGROUND In the apparent indeterminate form of Chagas' disease, which lacks any overt clinical, electrocardiographic, and radiological manifestations of organ damage, lesions of the intrinsic autonomic innervation of heart are not striking features and evidences for cardiac autonomic dysfunction are elusive and conflicting. OBJECTIVE To evaluate the cardiac autonomic modulation based on Val...