Pulmonary vein as an ectopic focus in digitalis-induced arrhythmia

  title={Pulmonary vein as an ectopic focus in digitalis-induced arrhythmia},
  author={Donald Cheung},
The tunica media of the pulmonary vein (PV) in many mammalian species, including man, is made up of cardiac muscle1–3. Brunton and Fayrer first reported that independent pulsation of the PV occurred in cats and rabbits even after activity of the heart had ceased4. Electrophysiological studies have also shown spontaneous electrical activity in isolated PVs of the guinea pig and a pacemaking region has been located at the distal end of the cardiac portion of the vein adjoining the smooth muscle… CONTINUE READING
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