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Background: Commotio cordis is sudden death resulting from a strike to the chest with a low energy object (typically a baseball). The etiology is thought to be ventricular fibrillation (VF). There is uncertainty about whether softer than standard (safety) baseballs will reduce the risk of sudden death in these young athletes.Methods: In a juvenile swine model, VF could be reproducibly induced by...
Background: Commotio cordis is sudden death resulting from a strike to the chest with a low energy object (typically a baseball). The etiology is thought to be ventricular fibrillation (VF). Despite prompt resuscitation, survival is rarely reported in these young athletes.Methods: In a swine model developed to evaluate the mechanism of commotio cordis, VF could be induced by 30 mph baseball strikes...
Background: Linear catheter ablation of the atria has been proposed as a technique for the treatment of atrial fibrillation. However, radiofrequency ablation (RF) may have limited penetration into the atrial wall, particularly in regions of trabeculation and anatomic complexity.Methods: We designed and tested an RF linear ablation catheter with a novel cooling design utilizing 4 electrically active...
Background: Although the syndrome of sudden death after low energy chest wall trauma (commotio cordis) has been described, the mechanism is unknown and an animal model does not exist.Methods: We developed a model of commotio cordis in swine with chest wall impact by an object the size and weight of a baseball at speeds of 31 mph. The impact was gated to the cardiac cycle.Results: We studied 18 animals,...