ELECTROCARDIOGRAM

What part of the hearts conduction system is shown in the diagram?

• SA node

• AV Node

• AV bundle

• Purkinje Fibers

V2 is placed on

• 4th intercostal space near the sternum margin on the right side

• 5th intercostal space near the sternum margin on the left side

• 4th intercostal space near the sternum margin on the left side

• 5th intercostal space near the sternum margin on the right side

According to IEC, this is the colour orders for chest leads (from V1 to V6):

• Black, red, yellow, green, blue, purple

• Red, yellow, green, brown, black, purple

• Red, yellow, green, blue, orange, purple

• White, black, red, yellow, green, purple

What is the physiological correspondence of ECG QRS complex?

• Repolarization of atrium

• Ventricular depolarization

• Septal depolarization

• Depolarization of Purkinje fibres

Calculate the rate of this ECG

• 98bpm

• 74bpm

• 93bpm

• 79bpm

The following is FALSE about normal ECG interpretation, except:

• Q wave can be seen in V1 lead

• T wave is inverted in aVR

• aVR is a mirror image of aVF

• R wave is prominent in V1

Normal axis of ECG is in between

• 0 to 90 degree

• -30 to 120 degree

• -30 to 90 degree

• -90 to 60 degree

These are the characteristics of the normal sinus rhythm except

• P wave should be a rounded shape

• P-R interval should be 5-6 small square

• P wave should be the same shape

• The rhythm should be regular

Regarding atrial flutter

• Shows irregular rhythm

• Saw tooth appearance

• Occurs due to suppression of SA

• Heart rate is lower than 100/min

Progressive lengthening of PR interval with subsequent loss of QRS complex is a sign of:

• Atrial fibrillation

• 1st degree heart block

• 2nd degree heart block

• Complete heart block