By mapping these triggers during the initiation of AF and ablating them within the pulmonary vein, he was able to render 62% of patients free of AF without the need for antiarrhythmic drugs. He found that 95-96% of the time these triggers originate in sleeves of muscle that extend into the pulmonary veins (PV), the veins that drain blood from the lungs back into the left upper chamber of the heart (left atrium). He put catheter in patients’ hearts and mapped the origin of the “triggers” that start atrial fibrillation. In 1998, Michelle Haissaguerre, a cardiac electrophysiologist in Bordeaux, France first described the use of catheter ablation for patients with atrial fibrillation. However, only over the past decade has catheter ablation been used to treast more complex rhythms like atrial fibrillation. Cather ablation has been used for many years to treat arrhythmias due to a focal source or pathway, such as AV nodal reentrant tachycardia or Wolff-Parkinson-White syndrome. Dr Scheinman’s work led directly to the development of radiofrequency energy catheters, which use radiofrequency energy to heat the catheter tip and perform much more precise ablation than was possible with DC ablation. Dr Scheinman remains today as an active member of the electrophysiology group at UCSF. Melvin Scheinman in 1981, using high energy DC shocks. The first catheter ablation in humans was performed by Dr.
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