In a surface ECG the QRS complex represents:

1. Atrial depolarization

2. Atrial repolarization

3. Ventricular depolarization

4. Ventricular repolarization

The diagram given here is the standard ECG of a normal person. the P-wave represents

the

1. contraction of both the atria

2. initiation of the ventricular contraction

3. beginning of the systole

4. end of systole

Continued consumption of a diet rich in butter, red meat and eggs for a long period may

lead to:

1. vitamin toxicity                   

2. kidney stones

3. hypercholesterolemia

4. urine laden with kidney stones

The machine taking the reading of electrical activity of heart is known as

(1) Electrocardiogram

(2) Electrocardiograph

(3) MRI

(4) Biopsy

The results of ECG are known as

(1) Electrocardiogram

(2) Electrocardiograph

(3) MRI

(4) Biopsy