Pacing and clinical electrophysiology : PACE
-
Pacing Clin Electrophysiol · Nov 1980
Case ReportsIncessant reciprocating atrioventricular tachycardia. Factors playing a role in the mechanism of the arrhythmia.
The case of a patient suffering from incessant supraventricular tachycardia is presented. The electrophysiological study showed the presence of an accessory atrioventricular (A-V) bundle with nodal-like properties and long conduction times. This structure was used as the retrograde arm of the tachycardia circuit. ⋯ During handgrip exercise a sustained tachycardia developed immediately. During ventricular stimulation a dual atrial response to a single paced ventricular premature beat was repeatedly observed, proving the availability of two separate A-V pathways for retrograde conduction. The case illustrates the labile nature of this type of accessory pathway, and suggests that autonomic changes can play an important role in the initiation, maintenance, termination, or even spontaneous cure of tachycardia in patients with this anomaly.
-
Pacing Clin Electrophysiol · Jul 1979
Historical ArticleFlashbacks: Ventricular fibrillation part I.
-
Pacing Clin Electrophysiol · Jan 1979
Historical ArticleFlashbacks: containment of tumors through electricity.
-
Pacing Clin Electrophysiol · Oct 1978
Case ReportsApparent malfunction of demand pacemakers due to spurious potentials generated by contact between two endocardial electrodes.
Malfunction of both temporary and permanent demand transvenous pacemakers was caused by contact between the two endocardial electrodes. Contact between these electrodes created spurious potentials which resulted in irregular inhibition of both demand units. The potentials were demonstrated by recording from the temporary wire. There was no interference with either pacemaker in the fixed rate mode and malfunction ceased when the temporary wire was removed.