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[Effort-induced atrioventricular block. Apropos of 62 cases]
M Lescure1, A M Dechandol, P Lagorce
1Service Cardiologie, Hôpital d'Auch.
Annales De Cardiologie Et D'Angeiologie
|November 1, 1995
Summary
Effort-induced atrio-ventricular block (AVB) often presents as poor exercise tolerance or fainting spells. This condition, frequently infranodal, necessitates investigation in patients with unexplained symptoms.
Area of Science:
- Cardiology
- Electrophysiology
Context:
- Effort-induced atrio-ventricular block (AVB) is a rare condition.
- Diagnosis is confirmed via stress testing or Holter ECG.
- A retrospective study analyzed 62 cases.
Purpose:
- To describe the clinical and electrophysiological features of effort-induced AVB.
- To identify patient demographics and presenting symptoms.
- To characterize the location and type of AVB.
Summary:
- The study included 62 patients (18 women, 44 men, mean age 64 years).
- Common presentations were poor exercise adaptation (66%) and syncope (32%).
- Most patients (77%) lacked underlying heart disease; AVB was typically Mobitz II (77%), infranodal (90%).
Impact:
- Effort-induced AVB often requires DDD pacing.
- Highlights the importance of investigating AVB in patients with unexplained exercise intolerance or syncope.
- Contributes to understanding the pathophysiology of AVB during exertion.