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Matthew Kay, DSc. Dept of Electrical and Computer Engineering Dept of Pharmacology and Physiology

kaymwk@gmail.com. Matthew Kay, DSc. Dept of Electrical and Computer Engineering Dept of Pharmacology and Physiology. Electrical rotors: a cause of sudden death. Rotors can be studied in great detail using computational models. RV. LV.

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Matthew Kay, DSc. Dept of Electrical and Computer Engineering Dept of Pharmacology and Physiology

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  1. kaymwk@gmail.com Matthew Kay, DSc. Dept of Electrical and Computer Engineering Dept of Pharmacology and Physiology Electrical rotors: a cause of sudden death. Rotors can be studied in great detail using computational models. RV LV

  2. Panoramic imaging reveals a dozen short lived rotors during VF in healthy swine hearts. Rotors rarely lasted longer than 1 sec. Stable epicardial rotors do not maintain VF. Continual formation of new rotors is critical for VF maintenance.

  3. Antitachycardia therapy to prevent ventricular fibrillation. Fast fluorescence imaging reveals successful antitachycardia pacing. Action potentials from the epicardium of small animal hearts (rabbit) show rotor termination by wavefront - wavefront collisions. Intracellular calcium transients from monolayers of cardiomyocytes show rotor termination by paced-induced rotor drift.

  4. Ischemic tissue is proarrhythmic by two mechanisms: delayed conduction or block and spontaneous (ectopic) activation. When and where might one mechanism dominate? Excised rat/rabbit heart model of local ischemia.

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