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[The - wave of apexcardiography in total AV block]
Zeitschrift Fur Kardiologie
|March 1, 1976
Insights
Apex cardiograms (ACG) in total heart block patients revealed A-waves during AV valve closure. These findings suggest A-waves are not solely caused by atrial contraction impacting the ventricular wall.
Area of Science:
- Cardiology
- Physiology
- Biomedical Engineering
Context:
- Total heart block presents unique challenges in cardiac electrophysiology.
- Apex cardiography (ACG) is a non-invasive technique to assess cardiac mechanics.
- Understanding wave generation in cardiac cycles is crucial for diagnosing arrhythmias.
Purpose:
- To investigate the origin of A-waves observed during the closure of atrioventricular (AV) valves in patients with total heart block using ACG.
- To differentiate the cause of A-waves from atrial contraction-induced phenomena.
Summary:
- Apex cardiograms in three patients with total heart block demonstrated distinct A-waves during AV valve closure.
- These A-waves altered the systolic wave morphology on the ACG.
- The presence of A-waves under these conditions indicates they are not solely a result of atrial contraction impinging on the ventricular wall.
Impact:
- Challenges the traditional understanding of A-wave generation in specific cardiac conditions.
- Provides new insights into the mechanical events occurring during total heart block.
- May refine the interpretation of ACG findings in patients with complex arrhythmias.
Abstract:
The apex cardiogram (acg) in three patients with total heart block showed also during closure of the a.v. valves a-waves, which modified the shape of the systolic wave of the acg. This means that in these cases the a-wave is not caused by impingement of the blood inflow from the atrium on the ventricular wall by contraction of the atrium itself.