Several markers of atrial or atrioventricular nodal abnormalities such a intervals ... of AF incidence and possibly of stroke incidence. ECG left ventricular hypertrophy is strongly associated ...

The ECG shows regular P waves with terminal P-inversion in V1 (left atrial abnormality). There is no evidence of conduction (complete heart block). The QRS complexes are regular at a rate slightly ...

This is one of the criteria for “left atrial abnormality.” Recent studies have attributed P-wave prolongation to conduction delay between the atria (Bachman’s bundle).