Spontaneous atrial premature depolarizations during paroxysmal reentrant tachycardia
| Autor: | George K. Massing, Albert L. Waldo, Thomas N. James |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Tachycardia
Paroxysmal tachycardia Cardiac Catheterization Pacemaker Artificial medicine.medical_specialty medicine.medical_treatment Electrocardiography Heart Conduction System Internal medicine medicine Humans Heart Atria cardiovascular diseases Tachycardia Paroxysmal Aged Cardiac catheterization medicine.diagnostic_test business.industry P wave Atrial premature depolarization Atrial depolarization Anesthesia cardiovascular system Cardiology Female medicine.symptom Cardiology and Cardiovascular Medicine business |
| Zdroj: | Journal of Electrocardiology. 9:175-180 |
| ISSN: | 0022-0736 |
| DOI: | 10.1016/s0022-0736(76)80073-8 |
| Popis: | The spontaneous onset and termination of many episodes of paroxysmal tachycardia, each initiated by an atrial premature depolarization, were studied in one patient. Surface electrocardiograms alone were inadequate to define the mechanisms underlying the frequent irregularity of atrial and ventricular cycle lengths during the tachycardia and the nature of spontaneous termination of the tachycardia. Unipolar atrial electrograms demonstrated that the irregularity during the tachycardia was due to premature atrial depolarizations that reset the reentrant cycle sustaining the tachycardia, and each spontaneous termination was due to an even more premature atrial depolarization interrupting the reentrant pathway. The genesis of the atrial premature depolarizations resetting and terminating the tachycardia, and their relationship to those initiating the tachycardia, are discussed. |
| Databáze: | OpenAIRE |
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