Heart Rate During Spontaneous and Induced Paroxysmal Supraventricular Tachycardia

It is generally assumed that paroxysmal supraventricular tachycardia (PSVT) induced during invasive electrophysiological study reproduces the patient's spontaneous, clinical arrhythmia. Even in the absence of antiarrhythmic drugs, however, there may be significant differences in characteristics...

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Bibliographic Details
Published in:Pacing and clinical electrophysiology 1995-12, Vol.18 (12), p.2155-2157
Main Authors: HAMER, MARK E., WILKINSON, WILLIAM E., McCARTHY, ELIZABETH A., PAGE, RICHARD L., PRITCHETT, EDWARD L.C.
Format: Article
Language:English
Subjects:
Adult
Cardiac Pacing, Artificial
Electrocardiography
Electrocardiography, Ambulatory
electrophysiological testing
Female
Heart Rate - physiology
Humans
Male
Middle Aged
paroxysmal supraventricular tachycardia
Tachycardia, Atrioventricular Nodal Reentry - diagnosis
Tachycardia, Atrioventricular Nodal Reentry - physiopathology
Tachycardia, Ectopic Atrial - diagnosis
Tachycardia, Ectopic Atrial - physiopathology
Tachycardia, Paroxysmal - diagnosis
Tachycardia, Paroxysmal - physiopathology
Tachycardia, Supraventricular - diagnosis
Tachycardia, Supraventricular - physiopathology
Telemetry
transtelephonic ECG monitoring
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Summary:It is generally assumed that paroxysmal supraventricular tachycardia (PSVT) induced during invasive electrophysiological study reproduces the patient's spontaneous, clinical arrhythmia. Even in the absence of antiarrhythmic drugs, however, there may be significant differences in characteristics of the induced and spontaneous arrhythmias. We compared the heart rate of PSVT in 38 patients who had undergone electrophysiological study with induction of PSVT who also had a spontaneous episode of PSVT documented by transtelephonic ECG monitoring during a period when all antiarrhythmic drugs were withheld. The heart rate during spontaneous PSVT was faster than the heart rate of PSVT induced during electrophysiological study; the mean difference was 16 beats/min (P < 0.001). We conclude that heart rate of PSVT induced during electrophysiological study generally underestimates the heart rate of spontaneous PSVT in the antiarrhythmic drug‐free state. This may be due to differences in the autonomic and hemodynamic states during spontaneous and induced arrhythmias.
ISSN:0147-8389
1540-8159
DOI:10.1111/j.1540-8159.1995.tb04641.x