Effect of Isometric Exercise on QTc Interval

Meher, Arati; Bhattacharjee, Maumita; Rampal, P; Kapoor, Richa; Sharma, Renuka

doi:10.7860/jcdr/2014/9533.4673

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…We found that shorter QTc intervals were associated with increased exercise in this sample. In general, the QT interval is affected by the heart rate and the relative activity of sympathetic and parasympathetic nerves (Meher et al, 2014). We used the corrected QT interval (QTc) in our analyses which corrects for heart rate.…”

Section: Discussionmentioning

confidence: 99%

“…We used the corrected QT interval (QTc) in our analyses which corrects for heart rate. The effect of exercise on QTc is highly variable as some studies have demonstrated lengthening (Meher et al, 2014), shortening (Chinushi et al, 2012;Srinath & Ravipati, 2011), or mixed results (Berger et al, 2011) of the QTc postexercise. Increased sympathetic nerve activity and catecholamine secretion may be associated with QT interval shortening (Chinushi et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…A lengthened QTc interval may be associated with increased risk for a ventricular arrhythmia and sudden death (Padfield et al, 2016;Postema & Wilde, 2014). Previous studies in non-ED populations demonstrated lengthening (Meher, Bhattacharjee, Rampal, Kapoor, & Sharma, 2014), shortening (Chinushi et al, 2012;Srinath & Ravipati, 2011), or mixed results (Berger et al, 2011) of the QTc postexercise.…”

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confidence: 96%

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Characterization and correlates of exercise among adolescents with anorexia nervosa and bulimia nervosa

Nagata

Carlson

Kao

et al. 2017

Intl J Eating Disorders

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Objective To characterize exercise behaviors among adolescents with anorexia nervosa (AN), atypical AN, or bulimia nervosa (BN), and determine associations between exercise and medical risk. Study design Cross-sectional electronic medical records of all patients evaluated by the Eating Disorder Program at Stanford between January 1997 and February 2011 were retrospectively reviewed. Results 1,083 subjects (961 females, 122 males; mean age 15.6) met eligibility criteria. Most patients (89.7%) reported exercise (mean 7.0 hours per week over mean 5.4 days per week) prior to presentation. Running (49.9%), calisthenics (40.7%), walking (23.4%), soccer (20.9%), and swimming (18.2%) were the most common exercises; a majority (60.6%) reported team sport participation. Males were less likely to report team exercise (p=0.005). Bradycardia (heart rate <50) at presentation was associated with team sport participation (adjusted odds ratio [AOR] 1.66, 95% confidence interval [CI] 1.02–2.72) and hours of exercise per week (AOR 1.05, 95% CI 1.02–1.09), controlling for diagnosis, sex, age, duration of illness, rate of weight loss, and percent median body mass index (%mBMI). Discussion Adolescents with AN, atypical AN, and BN reported high levels of exercise. Females reported more team sport participation. Greater exercise frequency and team sports participation were associated with bradycardia. Further studies assessing the relationship between exercise and bradycardia may help inform the medical management of adolescents with these eating disorders who are more physically active.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 96%

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Characterization and correlates of exercise among adolescents with anorexia nervosa and bulimia nervosa

Nagata

Carlson

Kao

et al. 2017

Intl J Eating Disorders

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“…In the study of Meher et al (23), isometric exercise was used, while in the present study the aerobic trainings were used so that the results of the study by Meher et al, is incontrast with the present study (23). It is suggested that most QT variations, due to exercise result from heart rate and less of them are due to other factors (24).…”

Section: Discussionmentioning

confidence: 47%

Interactive Effects of Aerobic Exercise and Music on Electrical Activity of the Heart in Non-Athletic Men

et al. 2019

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Background:The effect of exercises on the heart has been widely studied. Music can stimulate emotions as well as changes in cardiac activity. Objectives: The present research aimed to investigate the effect of aerobic training and music on the electrical activity of the heart in non-athletic men. Methods: A total of 32 non-athletic men were selected and divided into four groups (n = 8) including; (1) aerobic exercises, (2) music without aerobic exercises, (3) aerobic exercise with music, and (4) control subjects. Groups 1 and 3 only performed aerobic exercises for eight weeks, groups 2 and 3 listened to music for eight weeks, and group 4 only had their daily activities during this period. At the beginning of the study and at the end of the eighth week, the subjects' electrocardiogram (ECG) was measured. To analyze the findings, paired sample t-test and two-way ANOVA were used at a significance level of 0.05. Results:Aerobic training had a significant effect on QRS wave increase (P ≤ 0.05). Music had a significant effect on heart rate (HR) reduction and QRS wave enhancement (P ≤ 0.05). Aerobic exercise along with music had significant interactive effects on HR reduction and QRS wave enhancement (P ≤ 0.05). However, aerobic training had no significant effect on HR (P ≥ 0.05). Aerobic exercise and music had a significant effect on PQ interval, QT interval, QTc, and P wave (P ≥ 0.05). Furthermore, aerobic exercise with music had no interactive effects on PQ interval, QT interval, QTc, and P wave (P ≥ 0.05). Conclusions:According to the results of the study, aerobic exercise with music can help improve some cardiac parameters of nonathletic men.

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