Related Experiment Videos
[Indication for preventive pacemaker implantations in patients with severe disorders of atrioventricular conduction]
Insights
A novel Ajmalin stress test identifies patients with severe conduction disturbances at risk for Adams-Stokes attacks or complete heart block. Two patients required prophylactic pacemaker insertion after the test revealed high-grade atrioventricular block.
Area of Science:
- Cardiology
- Electrophysiology
- Pharmacology
Context:
- Severe conduction disturbances pose a risk for Adams-Stokes attacks and complete atrioventricular (A-V) block.
- Accurate patient evaluation is crucial for timely intervention and prevention of syncope or sudden death.
- Current diagnostic methods may not fully predict the risk of developing high-grade A-V block.
Purpose:
- To describe a new method for evaluating patients with severe conduction disturbances.
- To assess the utility of a pharmacologic stress test using Ajmalin to predict the development of high-grade A-V block.
- To identify patients who may benefit from prophylactic pacemaker insertion.
Summary:
- A pharmacologic stress test involving small doses of Ajmalin was administered to 9 patients with known conduction disturbances.
- Two patients developed higher degrees of A-V block (2:1 block and total A-V block) during the Ajmalin challenge.
- These two patients were subsequently identified as candidates for prophylactic pacemaker insertion.
Impact:
- This Ajmalin stress test can effectively identify patients at high risk for developing severe atrioventricular block.
- The procedure aids in selecting appropriate candidates for prophylactic pacemaker implantation, enhancing patient safety.
- This diagnostic approach may improve the management of patients with complex cardiac conduction abnormalities.
Abstract:
A method for the evaluation of patients with severe conduction disturbances who might develop Adams-Stokes attacks or total A-V block is described. In 9 patients with conduction disturbances a "stress test" of the conduction system with small dosis of Ajmalin was performed. In 2 patients a higher degree of A-V block developed (2: 1 block, total A-V block). These patients were considered as candidates for prophylactic pacemakerinsertion. During this procedure a temporary pacemaker electrode has to be put into the right ventricle to provide saftey for the patient.