Epicardial mapping of ventricular tachycardia induced by a large premature stimulus over nontransmural infarcts
| Autor: | J. Scott Kabas, Dennis L. Rollins, Katherine M. Kavanagh, William M. Smith, Sharon B. Melnick, Raymond E. Ideker |
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| Rok vydání: | 1991 |
| Předmět: |
medicine.medical_specialty
Myocardial Infarction Stimulus (physiology) Ventricular tachycardia Dogs Tachycardia Internal medicine Animals Medicine cardiovascular diseases Cycle length Epicardial mapping business.industry Heart Reentry medicine.disease Electric Stimulation Induced ventricular tachycardia medicine.anatomical_structure Ventricle Ventricular Fibrillation Ventricular fibrillation cardiovascular system Cardiology Cardiology and Cardiovascular Medicine business |
| Zdroj: | Journal of Electrocardiology. 24:83 |
| ISSN: | 0022-0736 |
| DOI: | 10.1016/s0022-0736(10)80022-6 |
| Popis: | Mapping has recently shown that electrically induced ventricular tachycardia (VI) and ventricular fibrillation (VF) both begin as figure-8 reentry: VI with a longer cycle length from spared tissue adjacent to an infarct (inf) and VF with a shorter cycle length from tissue around the electrode from which a large premature S2 is given. These results suggest the cycle length of the figure-8 rather than the mode of induction determines the type of arrhythmia. Thus a protocol similar to that by which a VF threshold is determined may induce VI rather than VFwhen performed in the spared tissue over an inf. We tested this hypothesis in 10 dogs in which the proximal LAD was partially occluded for 30 minutes. totally occluded for 90 minutes and then reperfused. Four days later a 3 x 3 cm plaque containing 121 recording electrodes was centered over the epicardial inf area. Ten S I stimuli were delivered from a total of 33 right ventricle and left ventricle sites outside the inf. An S2 was given to the epicardium over the |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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