单词electrocardiogram由三个语素组成，表示“心电图”的意思。

A record of electric wave occurring in the brain is called _______.( ) A: electromyogram B: electroencephalogram C: electrocardiogram D: electroencephogram

Wide QRS complex in electrocardiogram is helpful to differentiate ventricular tachycardia from paroxysmal supra ventricular tachycardia (PSVT).

Which of the following means the process of recording the electrical activity of the heart? A: stethoscope B: sphygmomanometer C: electrocardiogram D: electrocardiography

Which of the following means process of recording the heart’s electrical activity ? A: electrocardiogram B: electrocardiography C: electrocardiograph D: electroencephalogram

A 3-mo-old female infant has a history of poor feeding, shortness of breath during feedings, failure to thrive, and chronic cough. Physical examination reveals tachycardia and a gallop rhythm but no murmur. There is hepatomegaly but no cyanosis. A chest radiograph reveals cardiomegaly. The most appropriate diagnostic test is: A: Echocardiogram B: Electrocardiogram C: Blood culture D: Serum amino acids E: Urine pH