Cardiothoracic

Question 1

What is the determinant of the QRS length?

Answer 1

Speed of conduction through the ventricles

Question 2

Name the 2 causes of widened QRS complex.

Answer 2

Bundle branch blocks

Ventricular in origin

Question 3

What does the axis of an ECG told you about?

Answer 3

The net direction of depolarization

Question 4

What is the normal angle of depolarization?

Answer 4

-30 deg to 90 deg

Question 5

In bizarre angle (axis) on an ECG: what does it means?

Answer 5

The conduction is from ventricular origin

Question 6

RSR PRIME pattern in V1 and slurred S wave, what does it means?

Answer 6

RBBB

Question 7

LBBB mnemonics?

Answer 7

WilliaM

Question 8

RBBB mnemonics?

Answer 8

MarroW

Question 9

How to detect bizzare angle (of axis), on an ECG?

Answer 9

Negative lead I & II.

Question 10

What are the 4 causes of Left Axis Deviation?

Answer 10

1. Left vent. Hypertrophy
2. LBBB
3. inferior AMI
4. left ant. Fascicular block (LAFB)

Question 11

What are the 3 causes of RAD (right axis deviation)?

Answer 11

1. RVH (right ventricular hypertrophy)
2. Lateral AMI
3. Left post. Fascicular block (LPFB)

Question 12

In ECG, what are the inferior leads?

Answer 12

II, III, aVF

Question 13

In ECG, what are the anteroseptal leads?

Answer 13

V1 - V3

Question 14

In ECG, what are the lateral leads?

Answer 14

V4 - V6, I, aVL.

Question 15

In ECG, what blood vessel supplies the inferior leads?

Answer 15

Right coronary artery (RCA) - 66%

Question 16

In ECG, what blood vessel supplies the anteroseptal leads?

Answer 16

Left anterior descending (LAD)

Question 17

In ECG, what blood vessel supplies the lateral leads?

Answer 17

Left circumflex artery