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Obesity does not influence electrocardiographic parameters in coronary patients

      During the past 3 decades, prevalence of overweight adults has been increasing with approximately 33% of US adults overweight.
      • Kuczmarski R.J
      • Flegal K.M
      • Campbell S.M
      • Johnson C.L
      Increasing prevalence of overweight among US adults. The National Health and Nutrition Examination Surveys, 1960 to 1991.
      Because obesity is strongly linked to coronary mortality,
      • Jousilahti P
      • Tuomilehto J
      • Vartiainen E
      • Pekkanen J
      • Puska P
      Body weight, cardiovascular risk factors, and coronary mortality 15-year follow-up of middle-aged men and women in eastern Finland.
      the American Heart Association has identified obesity as a major risk factor for coronary heart disease.
      • Eckel R.H
      • Krauss R.M
      American Heart Association call to action obesity as a major risk factor for coronary heart disease.
      Obesity may affect electrocardiographic findings. Normal obese people are reported to have increased heart rate,
      • Frank S
      • Colliver J.A
      • Frank A
      The electrocardiogram in obesity statistical analysis of 1,029 patients.
      ,
      • el-Gamal A
      • Gallagher D
      • Nawras A
      • Gandhi P
      • Gomez J
      • Allison D.B
      • Steinberg J.S
      • Shumacher D
      • Blank R
      • Heymsfield S.B
      Effects of obesity on QT, RR, and QTc intervals.
      somewhat increased PR interval and QRS duration,
      • Frank S
      • Colliver J.A
      • Frank A
      The electrocardiogram in obesity statistical analysis of 1,029 patients.
      and a significant increased QTc interval.
      • Frank S
      • Colliver J.A
      • Frank A
      The electrocardiogram in obesity statistical analysis of 1,029 patients.
      ,
      • el-Gamal A
      • Gallagher D
      • Nawras A
      • Gandhi P
      • Gomez J
      • Allison D.B
      • Steinberg J.S
      • Shumacher D
      • Blank R
      • Heymsfield S.B
      Effects of obesity on QT, RR, and QTc intervals.
      ,
      • Carella M.J
      • Mantz S.L
      • Rovner D.R
      • Willis III, P.W
      • Gossain V.V
      • Bouknight R.R
      • Ferenchick G.S
      Obesity, adiposity, and lengthening of the QT interval improvement after weight loss.
      The QTc interval correlates with body weight,
      • Frank S
      • Colliver J.A
      • Frank A
      The electrocardiogram in obesity statistical analysis of 1,029 patients.
      ,
      • el-Gamal A
      • Gallagher D
      • Nawras A
      • Gandhi P
      • Gomez J
      • Allison D.B
      • Steinberg J.S
      • Shumacher D
      • Blank R
      • Heymsfield S.B
      Effects of obesity on QT, RR, and QTc intervals.
      and prolonged QTc intervals in obese subjects return to normal range after weight loss.
      • Carella M.J
      • Mantz S.L
      • Rovner D.R
      • Willis III, P.W
      • Gossain V.V
      • Bouknight R.R
      • Ferenchick G.S
      Obesity, adiposity, and lengthening of the QT interval improvement after weight loss.
      QTc prolongation is associated with an increased risk of sudden cardiac death.
      • Moss A.J
      Measurement of the QT interval and the risk associated with QTc interval prolongation a review.
      Ventricular tachyarrhythmias have been associated with obesity.
      • Messerli F.H
      • Nunez B.D
      • Ventura H.O
      • Snyder D.W
      Overweight and sudden death. Increased ventricular ectopy in cardiopathy of obesity.
      Although growing numbers of obese subjects have coronary heart disease, the electrocardiographic findings in coronary patients in relation to body mass index (BMI) have not been studied. Because prolongation of the QT interval is independent of risk factors in post–myocardial infarction patients for sudden cardiac death,
      • Peters R.W
      • Byington R.P
      • Barker A
      • Yusuf S
      Prognostic value of prolonged ventricular repolarization following myocardial infarction the BHAT experience. The BHAT Study Group.
      the magnitude of modulation of the QT interval by body weight was also investigated. The aim of this study was to determine the association between BMI and electrocardiographic repolarization parameters in patients with coronary artery disease.
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