Study of the P wave in normal and obstructive lung disease in Delhi.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001249:Asthma / Q000503:physiopathology; D001945:Breathing Exercises; D001991:Bronchitis / Q000503:physiopathology; D002648:Child; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006339:Heart Rate; D006801:Humans; D007194:India; D008171:Lung Diseases / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011660:Pulmonary Heart Disease / Q000503:physiopathology; D012907:Smoking / Q000503:physiopathology; D014636:Valsalva Maneuver