ECG Curve

Q. P wave in ECG represents which of the following actions in the heart?

1. Repolarisation of the atria
2. Depolarisation of the atria
3. Depolarisation of the ventricles
4. None of the above

Q. Lub sound is due to ______________

1. closing of semilunar valve
2. opening of semilunar valve
3. closing of atrioventricular valve
4. opening of atrioventricular valve

Q. Distinguish between resting potential and action potential.

Q.

Which of the following is false about ECG?

1. P wave $\to$ artial depolarisation

2. QRS complex $\to$ ventricular depolarisation

3. T wave $\to$ ventricular repolarisation

4. ST depression indicates infarction

Q. Ventricular muscle depolarization is indicated by ___________.

1. P wave
2. QRS complex
3. PR interval
4. T wave

Q.

Why would a doctor order and ECG?

Q.

In ECG, the depolarisation of atria is indicated by

1. R-wave

2. Q-wave

3. P-wave

4. S-wave

Q. In normal ECG, the component that signifies duration of one cardiac cycle is ______.

1. Q-T interval
2. S-T segment
3. P-R interval
4. R-R interval

Q. Match the following:

$\begin{array}{cc}\text{A. P wave}& \text{i) depolarisation of atria}\\ \text{B. T wave}& \text{ii) repolarisation of ventricles}\\ \text{C. QRS wave}& \text{iii) depolarisation of ventricles}\end{array}$

1. a-i, b-ii, c- iii
2. a-ii, b-iii, c-i
3. a-iii, b-i, c-ii
4. a-iii, b-ii, c-i

Q. EXPLAIN CLEARLY WHAT ARE FORAMEN OVALE AND DUCTUS ARTERIOSUS

Q.

Draw a standard ECG and explain the different segments in it.

Q. Beating of cilia in Paramecium is ___________.

1. Synchronous
2. Metachronous
3. Both A and B
4. No coordination

Q. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

1. S - Start of systole
2. T - end of diastole
3. P - depolarization of the atria
4. R- repolarization of ventricles

Q. A man who is an old case of myocardial ischaemia goes to his doctor for his routine check up. What change will be seen on his ECG recording?

1. P wave changes
2. Q waves
3. T wave changes
4. Tall R waves