A 75-year-old woman with situs inversus totalis, dextrocardia, a patent foramen ovale (PFO), and a double-chamber right ventricle with subpulmonic outflow obstruction presented with highly symptomatic ...
Atrial echo beats (a.k.a. "reciprocal beats") occur when a premature ventricular complex is conducted backward (retrograde) across the AV node back to the atrium (a.k.a "ventriculoatrial conduction").