Comparative study of equations of estimate of the maximum heart rate

2004 ◽  
Vol 3 (2) ◽  
pp. 108-114
Author(s):  
Fernando Policarpo Barbosa ◽  
Hildeamo Bonifácio Oliveira ◽  
Paula Roquetti Fernandes ◽  
José Fernandes Filho
Keyword(s):  
Heart Rate ◽  
Comparative Study ◽  
Maximum Heart Rate

Cardiac output in muscular exercise at 5,800 m (19,000 ft)

1964 ◽  
Vol 19 (3) ◽  
pp. 441-447 ◽  
Author(s):  
L. G. C. E. Pugh
Keyword(s):  
Heart Rate ◽  
Cardiac Output ◽  
Sea Level ◽  
Indirect Evidence ◽  
Mean Value ◽  
Muscular Exercise ◽  
Maximum Output ◽  
Work Intensity ◽  
Maximum Heart Rate ◽  
Sea Level Pressure

Cardiac output during muscular exercise was estimated by the acetylene technique on four members of the Himalayan Scientific and Mountaineering expedition 1960–1961 at sea level and 5,800 m (19,000 ft). The output for a given work intensity at 5,800 m (19,000 ft) was comparable with the output at the same work intensity at sea level, but the maximum output was reduced, the mean value being 16 liters/min, compared with 23 liters/min at sea level. Heart rates during light and moderate exercise were higher than the rates observed at the same work intensity at sea level. The maximum heart rate during exercise was limited to 130–150 beats/min compared with 180–196 beats/min at sea level. The stroke volume at altitude was lower than at sea level at each work rate. On breathing oxygen at sea-level pressure, heart rate for a given work intensity was reduced; but the maximum heart rate increased. Indirect evidence suggested that maximum cardiac output increased but probably not to the sea-level values because of the increased hemoglobin and lower heart rate. altitude acclimatization; cardiac function, work and altitude; hypoxia and cardiac output Submitted on July 29, 1963

Abstract 9815: Nadolol Seems to Be Superior to Selective Beta Blockers in Patients With Catecholaminergic Polymorphic Ventricular Tachycardia: Is a Smaller Arrhythmic Window Part of the Explanation?

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Ida Skrinde Leren ◽  
Jørg Saberniak ◽  
Eman Majid ◽  
Trine F Haland ◽  
Thor Edvardsen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Ventricular Tachycardia ◽  
Beta Blockers ◽  
Maximum Tolerated Dose ◽  
Catecholaminergic Polymorphic Ventricular Tachycardia ◽  
Polymorphic Ventricular Tachycardia ◽  
Maximum Heart Rate ◽  
Exercise Tests ◽  
Severe Arrhythmia ◽  
First Choice

Introduction: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inheritable arrhythmogenic disease, and typically presents as syncope or sudden cardiac death during exercise. Beta blockers are first choice therapy but little is known about antiarrhythmic effects of different beta blockers in CPVT. Nadolol has shown superior antiarrhythmic effect in other cardiomyopathies. Hypothesis: We hypothesized that nadolol is superior to selective beta blockers in arrhythmia protection in CPVT patients. Methods: We included 34 CPVT patients (age 34±19 yrs, 44% female, 88% RYR2 mutation positive). We serially performed 2 bicycle exercise tests in each patient; 1)>6 weeks on maximum tolerated dose of selective beta blockers. 2)>6 weeks on maximum tolerated dose of nadolol. We recorded resting and maximum heart rate (HR), HR at first arrhythmia and the most severe arrhythmia occurring. Arrhythmic window was defined as the difference between maximum HR and HR at first arrhythmia. Severity of arrhythmias was scored as arrhythmic score: no arrhythmias (0point), single ventricular extra systoles (1point), bigemini (2points), couplets (3points) and nonsustained VT (4points). Results: Resting HR was similar on nadolol and selective beta blockers (54±10bpm vs. 56±14bpm, p=0.50), while maximum heart rate was lower on nadolol (122±21bpm vs. 139±24bpm, p<0.01). First arrhythmias occurred at similar HR at both exercise tests (113±21bpm vs. 113±19bpm, p=1.0). Consequently, arrhythmic window was smaller during nadolol treatment (17±10bpm vs. 32±26bpm, p=0.03) (Figure) and also the arrhythmic score was lower than on selective beta blockers (1.1±1.2 vs. 2.4±0.9, p<0.01). Conclusion: Arrhythmic score was lower on nadolol compared to selective beta blockers. Also, arrhythmic window, representing the span of heart rates where arrhythmias may occur and progress in severity, was smaller. This suggests that nadolol should be the beta blocker of choice in CPVT patients.

Heart Rate Response to Exercise

2018 ◽  
pp. 437-445
Author(s):  
Gregory S. Thomas
Keyword(s):  
Heart Rate ◽  
Physical Fitness ◽  
Sample Size ◽  
Older Persons ◽  
Heart Rate Response ◽  
Large Sample Size ◽  
Maximum Heart Rate ◽  
Large Sample ◽  
Response To Exercise

The chapter Heart Rate Response to Exercise reviews the studies performed to estimate a patient’s maximum predicted heart rate. While the commonly used formula (220 – age), developed in 1971, is easy to remember, it underestimates the actual maximum heart rate in older persons. Studies of large sample size have found the maximum heart rate to be relatively independent of sex and physical fitness but to incrementally decline with age. The decrease with age is less than 1 beat per minute per year, however. A more accurate and recommended formula is [(208) – (0.7)(age)] as developed by Tanaka and colleagues.

scholarly journals Comparative Study of Heart Rate, Blood Pressure and Selective Attention of Subjects Before and After Music

2019 ◽  
Vol 4 (1) ◽  
pp. 625-628
Author(s):  
Nisha Ghimire ◽  
Renu Yadav ◽  
Soumitra Mukhopadhyay
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Reaction Time ◽  
Comparative Study ◽  
Error Correction ◽  
Vital Signs ◽  
Stroop Test ◽  
Before And After ◽  
Paired T Test ◽  
After Error

Introduction: Studies have shown different views regarding the effect of music in vitals e.g Heart rate (HR), Blood pressure (BP) and atiention. The effect of preferred music with lyrics in vitals and reaction time in stroop test has not been performed in Nepalese students so, we conducted the study. Objective: To find out the change in HR, BP and reaction time in Stroop test before and after their preferred music with lyrics. Methodology Thirty male medical and paramedical students aged 25.27 ± 2.0 participated in study. The vital signs and reaction time in Stroop test before and after music was taken. Results Paired-t test was used to compare means before and after exposure to music. The means are expressed as Mean ± SD. Heart rate (HR) increased after exposure to music (66.33±9.51 Vs 67.2±8.44) (p<.05). The error in Stroop test was less after music (.66±.49 Vs.63±.66) (p<.05). The reaction time after error correction decreased post exposure to music (24.117±4.61Vs23.29±4.45) (p<.05). Conclusion The heart rate increased after exposure to music. The errors decreased after listening to music which also decreased reaction time.

Children’s Heart Rates during Physical Education Lessons: A Review

1996 ◽  
Vol 8 (3) ◽  
pp. 215-233 ◽  
Author(s):  
Gareth Stratton
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Physical Education ◽  
Vigorous Physical Activity ◽  
Moderate Physical Activity ◽  
Physical Educators ◽  
Vigorous Activity ◽  
Education Curriculum ◽  
Maximum Heart Rate ◽  
Physically Active

Physical educators have purported to teach children to be physically active and to promote their fitness. To achieve these goals, children should regularly experience moderate-to-vigorous physical activity (MVPA) during physical education lessons. For the purposes of this review, moderate physical activity is that which elicits a heart rate of 50% of maximum heart rate reserve (MHRR), moderate-to-vigorous activity elicits 60% of MHRR, and vigorous activity elicits 75% of MHRR. Duration criteria were set at 50% of lesson time or 20 min. The majority of lessons described in previous reports failed to achieve these criteria, although problems were noted in method and analyses of data. Lessons with physical activity as a direct goal have been successful in increasing MVPA. A greater focus on physical activity is required in the planning and delivery of physical education lessons if the physical activity and fitness goals of the physical education curriculum are to be met.

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