نتایج جستجو برای: 75 maximal heart rate and 80
تعداد نتایج: 17001815 فیلتر نتایج به سال:
BACKGROUND Equations for predicting maximal heart rate (HRmax) are widely used in exercise testing and for training prescription, but their efficacy remains controversial in the literature. OBJECTIVE To compare maximal heart rate during cardiopulmonary exercise testing (CPET) using the prediction equations developed by Karvonen and Tanaka. METHODS Of the 24,120 maximal treadmill graded exer...
Introduction: Determining the VO2 max of individuals is of great importance. The VO2 max refers to the maximum oxygen that can be consumed in the body in one minute and depends on factors such as physical conditions, environmental parameters, and physiological characteristics of the individual.. Noise and heat are among the factors influencing VO2 max (also called maximal oxygen uptake or maxim...
We studied exercise performance before and after conversion of atrial tachycardia to sinus rhythm, atrial bradycardia, or junctional rhythm in 10 patients 9-25 years of age 8-20 years after congenital heart disease surgery (complete transposition of the great arteries, seven of 10 patients). The same maximal cycle (five of 10 patients) or treadmill (five of 10 patients) exercise protocol was pe...
This chapter discusses research conducted to evaluate the prognostic significance of premature ventricular contractions (PVCs) on a routine electrocardiogram (ECG), and to evaluate their relationship to heart rate, heart failure and sport participation. Identifying parameters to help risk stratify patients and provide prognostic implications can help identify individuals who may benefit from ea...
during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...
Central arterial stiffness is associated with incident hypertension and negative cardiovascular outcomes. Obese individuals have higher central blood pressure (BP) and central arterial stiffness than their normal-weight counterparts, but it is unclear whether obesity also affects hemodynamics and central arterial stiffness after maximal exercise. We evaluated central hemodynamics and arterial s...
We studied the degree of coronary artery dilation resulting from increasing doses of intracoronary nitroglycerin (NTG). Heart rate, aortic pressure and coronary artery angiograms were recorded before and after 5-, 50-, 150- and 250-microgram doses of NTG infused into the left main coronary artery. Coronary artery diameters were measured by a magnification angiographic technique. After intracoro...
With increased dietary NaCl intake (8% NaCl), the borderline hypertensive rat develops hypertension, thus expressing the phenotype of the spontaneously hypertensive parent. Since arterial baroreceptor reflex function is impaired in the spontaneously hypertensive parent, it was the objective of this study to examine arterial baroreceptor reflex function in the borderline hypertensive rat made hy...
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