The minimum QT interval averaged 261 ± 10 ms for HR> 120 and the maximum 389 ± 9 ms for HR ¤ 60; the corresponding mean value of QTc (i.e., QT corrected for HR) ranged from 388 ±8 for HR¤60 beats/min to 403 ±14 ms for HR> 120 beats/min. The results of the present...
The minimum QT interval averaged 261 ± 10 ms for HR> 120 and the maximum 389 ± 9 ms for HR ¤ 60; the corresponding mean value of QTc (i.e., QT corrected for HR) ranged from 388 ±8 for HR¤60 beats/min to 403 ±14 ms for HR> 120 beats/min. The results of the present...
Aims and Objectives: To determine whether abdominal obesity is associated with a prolongation of the QT interval corrected for heart rate (QTc) on the electrocardiogram (EKG) in Indian males with normal BMI. Materials and Methods: It was a cross-sectional study involving 100 males with normal ...
The 2ndpercentile, median, and 98thpercentile of the studied parameters were as follows: PR interval was 102 ms, 140 ms, and 196 ms, respectively, in females and 104 ms, 144 ms, and 202 ms, respectively, in males. P-wave duration was 76 ms, 100 ms, and 126 ms in females and 62...
Aims and Objectives: To determine whether abdominal obesity is associated with a prolongation of the QT interval corrected for heart rate (QTc) on the electrocardiogram (EKG) in Indian males with normal BMI. Materials and Methods: It was a cross-sectional study involving 100 males with normal...
The corrected QT interval (QTc) is widely used in pharmaceutical studies and clinical practice. Bazett's QT correction formula is still the most popular, despite Simonson's warning in 1961 that it could not be recommended. Other QTc formulae, e.g. Fridericia, Framingham, and Hodges, are ...
Two QT rate adjustment formulas were identified which both minimized rate-dependency in the 98th percentile limits: QTcmod, based on an electrophysiological model (QTcMod = QTx(120 + HR)/180)), and QTcLogLin, a power function of the RR interval with exponents 0.37 for men and ...
Case 14 was the only isolated LQTS case, she and her father were heterozygous for the p.Arg1644His mutation; however, her father’s ECG showed a normal QTc interval (432 ms) with bradycardia (49 bpm). From a total of 45 SCN5A mutation carriers, 24 were affected with an arrhythmogenic ...