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...
QTc is equal to QT interval in seconds divided by the square root of the preceding RR interval in seconds. When heart rate is par- ticularly fast or slow, the Bazett’s formula may overcorrect or undercorrect, respectively, but it remains the standard for clinical use. The cube root ...
Early screening and diagnosis of CAD are thus of great significance. While coronary angiography (CAG) is considered the “gold standard” for diagnosing CAD, it is not suitable for screening due to its invasive nature, high cost, and the need for specialized equipment and personnel [3]. In c...
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...
polymorphisms in CACNA1C, P1820L and V1821M, which were found in 31 and 27 of 114 healthy controls. The G490R mutation was also found in his two daughters (QTc=360 and 373). The daughter with the longer QTc interval (373 msec) also displayed a known polymorphism in KCNH2 (K897T)...
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...
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 ...