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[Prolonged asystole requiring resuscitation techniques during head-tilt table test]
A Pedrote1, F Errazquin, J Quero
1Unidad de Electrofisiología y Arritmias, Hospital Universitario Virgen del Rocío, Sevilla.
Revista Espanola De Cardiologia
|May 1, 1993
Summary
A prolonged cardiac asystole during a head-up tilt test, lasting 29 seconds, highlights the potentially lethal nature of cardioinhibitor reflex syncope. This vasovagal syncope case required resuscitation, underscoring risks of sudden cardiac death.
Area of Science:
- Cardiology
- Neurology
- Clinical Medicine
Background:
- Recurrent syncope necessitates thorough diagnostic evaluation.
- Head-up tilt table testing is a key diagnostic tool for syncope of unknown origin.
- Normal electrophysiological studies rule out certain cardiac arrhythmias.
Observation:
- A patient with recurrent syncope experienced a 29-second cardiac asystole during a head-up tilt table test.
- Cardiac rhythm spontaneously resumed 19 seconds after adopting a supine position, requiring resuscitation maneuvers.
- This observed asystole duration is unprecedented in existing literature for tilt table tests.
Findings:
- The case presents an unusually prolonged, cardioinhibitor reflex-induced asystole during diagnostic testing.
- Chest thumping was required for resuscitation, indicating a severe vasovagal response.
- Spontaneous rhythm recovery typically occurs rapidly upon assuming a horizontal position, unlike in this case.
Implications:
- This case supports the hypothesis that cardioinhibitor reflex syncope can be potentially lethal.
- Prolonged asystole during vasovagal syncope may represent a significant risk factor for sudden cardiac death.
- Further research is warranted to understand and manage severe vasovagal responses during diagnostic testing.