Similar heart rates, different QT-intervals

Similar heart rates, different QT-intervals

The authors hypothesized that the QT-interval depends not only on rate, but also on autonomic influences. To study this, the authors compared QT-intervals within 14 healthy subjects (7 male/7 female, ages 26.0/spl plusmn/3.1 years), at equal heart rates during handgrip and during head-up tilt. QT- a...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Levert, J.V., Swenne, C.A., Maan, A.C., Schalij, M.J., Viergever, E.P., Frederiks, J., Pfeiffer, A.H., Bruschke, A.V.G.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Arterial blood pressure
Baroreflex
Cardiology
Equations
Heart rate
Hospitals
Medical diagnostic imaging
Myocardium
Protocols
Sympathetic nervous system
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The authors hypothesized that the QT-interval depends not only on rate, but also on autonomic influences. To study this, the authors compared QT-intervals within 14 healthy subjects (7 male/7 female, ages 26.0/spl plusmn/3.1 years), at equal heart rates during handgrip and during head-up tilt. QT- and QTc-intervals during handgrip were significantly larger than during tilt (QT: 403/spl plusmn/24 vs. 394/spl plusmn/25 ms; QTc: 436/spl plusmn/16 vs. 426/spl plusmn/15 ms). This finding demonstrates that rate alone is not sufficient to interpret the QT-interval.
ISSN:0276-6547
0276-6574
DOI:10.1109/CIC.1996.542527