1. Acute blood pressure effects at the onset of supraventricular and ventricular tachycardia
- Author
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Jeffrey J. Goldberger, Michele Parker, Alan H. Kadish, and Taresh Taneja
- Subjects
Adult ,Male ,Tachycardia ,medicine.medical_specialty ,Heart disease ,Hemodynamics ,Blood Pressure ,Ventricular tachycardia ,Heart Conduction System ,Internal medicine ,Tachycardia, Supraventricular ,medicine ,Humans ,Ventricular Function ,cardiovascular diseases ,Ejection fraction ,business.industry ,Age Factors ,Cardiac Pacing, Artificial ,Blood Pressure Determination ,Stroke Volume ,Middle Aged ,medicine.disease ,Apex (geometry) ,Blood pressure ,Anesthesia ,Tachycardia, Ventricular ,cardiovascular system ,Cardiology ,Female ,Supraventricular tachycardia ,medicine.symptom ,Electrophysiologic Techniques, Cardiac ,Cardiology and Cardiovascular Medicine ,business - Abstract
This study was designed to assess the effects of tachycardia origin, the significance of atrial contribution, and the effects of left ventricular ejection fraction on hemodynamically tolerated ventricular tachycardia (VT) and supraventricular tachycardia (SVT). Forty-one subjects with inducible hemodynamically tolerated VT (n = 24) or SVT (n = 17) with mean ages of 60 +/- 13 and 40 +/- 16 years and mean ejection fractions of 32 +/- 15% and 59 +/- 5%, respectively, were studied. VT and SVT were induced by standard techniques, and femoral arterial blood pressure (BP) was recorded for 30 seconds. After tachycardia termination, with >/=3 minutes between conditions, ventricular overdrive pacing was performed from the right ventricular (RV) apex and then the RV outflow tract, followed by atrioventricular (AV) pacing at the tachycardia cycle length. Mean BP was measured every 5 seconds. Linear regression methods were used to model BP response for the 2 groups. There was a significant increase in BP over the 20-second interval after the induction of VT and SVT (0.55 +/- 0.21 and 1.0 +/- 0.20 mm Hg/s, respectively, p
- Published
- 2002