. . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "398246" . "0363-6135" . "The time lag of the QT interval adaptation to heart rate changes (QT/RR hysteresis) was studied in 40 healthy subjects (18 females; mean age, 30.4 +/- 8.1 yr) with 3 separate daytime (> 13 h) 12-lead electrocardiograms (ECG) in each subject. In each recording, 330 individual 10-s ECG segments were measured, including 100 segments preceded by 2 min of heart rate varying greater than +/- 2 beats/min. Other segments were preceded by a stable heart rate. In segments preceded by variable rate, QT/RR hysteresis was characterized by lambda parameters of the exponential decay models. The intrasubject SDs of lambda values were compared with the intersubject SD of the individual means. The lambda values were also correlated to individually optimized parameters of heart rate correction. Intrasubject SDs of lambda were substantially smaller than the population SD of individual means (0.390 +/- 0.197 vs. 0.711, P < 0.0001). The lambda values were unrelated to the QT/RR correction parameters." . . "Subject-specific profiles of QT/RR hysteresis"@en . . "8"^^ . . "[34DB217D0130]" . . "Schmidt, G." . . "The time lag of the QT interval adaptation to heart rate changes (QT/RR hysteresis) was studied in 40 healthy subjects (18 females; mean age, 30.4 +/- 8.1 yr) with 3 separate daytime (> 13 h) 12-lead electrocardiograms (ECG) in each subject. In each recording, 330 individual 10-s ECG segments were measured, including 100 segments preceded by 2 min of heart rate varying greater than +/- 2 beats/min. Other segments were preceded by a stable heart rate. In segments preceded by variable rate, QT/RR hysteresis was characterized by lambda parameters of the exponential decay models. The intrasubject SDs of lambda values were compared with the intersubject SD of the individual means. The lambda values were also correlated to individually optimized parameters of heart rate correction. Intrasubject SDs of lambda were substantially smaller than the population SD of individual means (0.390 +/- 0.197 vs. 0.711, P < 0.0001). The lambda values were unrelated to the QT/RR correction parameters."@en . . "10.1152/ajpheart.00625.2008" . "000261399900018" . . "Malik, Marek" . "Subject-specific profiles of QT/RR hysteresis" . "Subject-specific profiles of QT/RR hysteresis" . . "Novotn\u00FD, Tom\u00E1\u0161" . "I, P(NR9340), V" . . "4"^^ . . . . "6" . . "RIV/00216224:14110/08:00059842" . "Hnatkova, Kate\u0159ina" . "295" . "1"^^ . "RIV/00216224:14110/08:00059842!RIV13-MSM-14110___" . "14110" . "Subject-specific profiles of QT/RR hysteresis"@en . . "QT adaptation; individual QT correction; electrocardiogram measurement; corrected QT variability"@en . . . "AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY" .