heart rate turbulence


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heart rate turbulence

fluctuations of electrocardiographic cycle length after a ventricular premature contraction.
References in periodicals archive ?
Simultaneous assessment of T-wave alternans and heart rate turbulence on Holter electrocardiograms as predictors for serious cardiac events in patients after myocardial infarction.
Heart rate turbulence (HRT) a comprehensive evaluation of cardiac autonomic reflexes.
Heart rate turbulence (HRT) and deceleration capacity (DC) were analyzed using programs adopted from Bauer et al.
Of the 357 patients classified as healthy, 21 had abnormal heart rate turbulence.
But for those with abnormal values for heart rate turbulence onset and turbulence slope, the survival probability was 75%.
Some heart rate parameters such as heart rate turbulence and HRV are more useful in stratifying cardiovascular risk than in evaluating a given patient's clinical status (13, 14).
GE's Heart Rate Turbulence algorithm measures and compares the heart rate before and after premature beats, providing comparison data used to measure how the patient's heart and autonomic nervous system work together, which can determine cardiac health.
Heart rate turbulence parameters, turbulence onset (TO) and turbulence slope (TS) were calculated automatically by a computer program (HRT View, Version 0.
Given this background future research directions need to include: (i) prospective long-term follow-up of non-dipper subgroups for target organ damage and arrhythmic outcomes both in normotensive and hypertensive groups, (ii) evaluate the involvement of noncardiovascular autonomic system in different patterns of circadian blood pressure, (iii) assess the relation of circadian blood pressure with autonomic indices, ventricular depolarization and repolarization processes with more sensitive methods like non-linear dynamics, heart rate turbulence, QT dynamicity, T wave alternans or fragmented QRS.
Heart rate turbulence (HRT) expresses ventriculophasic sinus arrhythmia and has been considered to reflect cardiac autonomic activity.