patients with mac had a higher prevalence of cardiomegaly on chest x-ray ( p less than 0.0001 ) , left atrial and left ventricular enlargement by echocardiography ( p less than 0.0001 ) , precordial murmurs ( p less than 0.0001 ) , diabetes mellitus ( p less than 0.0001 ) , systemic hypertension ( p less than 0.025 ) and total conduction defects on surface electrocardiograms ( p less than 0.0001 ) compared with the age- and sex-matched control subjects .
C0018800
cardiomegaly
C0149721
left ventricular enlargement