Time course studies are critical for understanding regulatory mechanisms and temporal constraints in ectothermic animals acclimating to warmer temperatures. Therefore, we investigated the dynamics of heart rate and its neuro-humoral control in rainbow trout ( ITALIC! Onchorhynchus mykissL.) acclimating to 16°C for 39 days after being acutely warmed from 9°C. Resting heart rate was 39 beats min(...

a number of epidemiologic studies have reported a positive relationship between heart rate, cardiovascular disease and mortality. to examine the correlation between heart rate and mortality after acute myocardial infarction (ami), 2147 patients hospitalized in coronary care units in isfahan were investigated in a cross-sectional study. their heart rate was measured according to an electrocardio...

background: patients with chronic stable angina often have a state of sympathetic hyperactivity. it is considered associated with myocardial ischemia and disappears after ischemia elimination. the aim of this study was to investigate the changes in heart rate variability parameters, a noninvasive technique for the evaluation of the autonomic nervous system activity, after successful revasculari...

background: esophagectomy is considered to be the main treatment for esophageal malignancies. among the different methods, transhiatal approach can cause less damage to patients and is widely used however, manipulation of esophagus result in heart rate and blood pressure variations. the aim of this study was to investigate changes in blood pressure and heart rhythm during transhiatal esophagect...

Cardiopulmonary exercise testing (CPET) is important for the differential diagnosis of dyspnoea-fatigue syndromes. The test more typically includes measurements of ventilation (VE), carbon dioxide output (VCO2), and oxygen uptake (VO2) at a progressively increased workload (W) until a maximum VO2, called VO2max or VO2peak to define aerobic exercise capacity, but steady state evaluations have ut...

CONTEXT Chronotropic incompetence, an attenuated heart rate response to exercise, is a predictor of all-cause mortality in healthy populations. This association may be independent of exercise-induced myocardial perfusion defects. OBJECTIVE To examine the prognostic significance of chronotropic incompetence in a low-risk cohort of patients referred for treadmill stress testing with thallium im...