Note that left atrial enlargement is not able to be diagnosed in the presence of atrial fibrillation because this rhythm is defined by erratic atrial activity and no visible P wave on the ECG.

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 ...

regression of left atrial hypertrophy, or improved intra-atrial conduction, none of which is measurable by echocardiography or the surface ECG. Weight loss produced a dramatic decrease in the ...