Heart rate maximum = 192 - (0.007 × age²) We chose this formula because it is one of the most accurate formulas around. To compare, the commonly used Haskell & Fox equation, Heart rate maximum = 220 - age, was, according to one of its creators, "never supposed to be an absolute...
changes in heart rate or investigated cardiorespiratory variation during cardiac awareness tasks. Cardiorespiratory dynamics refer to the acknowledged influence of breathing on heart rate and blood pressure, and vice versa31. This influence is most readily apparent in the case of the effect of breathing...
Heart rate variability and heart rate in healthy volunteers. Is the female autonomic nervous system cardioprotective? Eur. Heart J. 19, 1334–1341 (1998). Article CAS Google Scholar Murphy, E., Amanakis, G., Fillmore, N., Parks, R. J. & Sun, J. Sex differences in metabolic ...
Specifically, the agreement analyses in Figures 6 and 8 suggest that the mean values of the heart rate difference between the proposed method and PW Doppler are less than 1 bpm. The correlation coefficient is 73% for FHR and 94% for MHR with p < 0.001. The results indicate that the ...
VelazquezPerezL.C.MontesBrownJ.ingentaconnectClinical Neurophysiology ShannonSharma K, Romano J, Ayyar D, Rotta F, Facca A, Sanchez-Ramos J. Sympathetic skin response and heart rate variability in patients with Huntington disease. Arch Neurol 1999;56:1248-1252....
Type A personality (hard driving, persistent, involved in work) was studied as a conditioner of the effects of quantitative work load and role ambiguity (stresses) on anxiety, depression, resentment, and heart rate (strains) among 73 male users of a university computer system that was approachin...
The heart acts as a pump and maintains circulation of the blood by alternate concentration and relaxation of cardiac muscle (the myocardium). It generally contracts at a rate of 70 to 75 beats/minute in a healthy 70-kg person at rest. The normal heart rhythm, known as sinus rhythm, origin...
Cardiac performance depends on a wide variety of factors, of which preload, afterload, heart rate, and contractility are the best recognised. However, other factors play important roles but are less acknowledged. The diastolic ventricular interaction (DVI) and its impact on preload, the preload rec...
To assess the prevalence of depressed heart rate variability (HRV) after an acute myocardial infarction (MI), and to evaluate its prognostic significance in the present era of immediate reperfusion. Time-domain HRV (obtained from 24-h Holter recordings) was assessed in 326 patients (63.5 ± 12.1...
73, 653–657 (1994). Article CAS PubMed Google Scholar Rich, M. W. et al. Correlation of heart rate variability with clinical and angiographic variables and late mortality after coronary angiography. Am. J. Cardiol. 62, 714–717 (1988). Article CAS PubMed Google Scholar Kang, H. ...