Quiz

Question 1

What is the criteria for a right bundle branch block?

Answer 1

RsR pattern (M pattern) only in QRS complex (not P mitrale)

Question 2

What leads is the RsR pattern that is found in right bundle branch block?

Answer 2

Leads V1-V2

Question 3

What changes will you get in the lateral leads for right bundle branch block?

Answer 3

Deep, broad SLURRED S wave in leads I, aVL and V5 to V6

Question 4

What is the main sign of hypocalcaemia on an ECG?

Answer 4

Prolongation of the QT interval

Question 5

What is the ECG manifestation of pseudo-pacemaker syndrome?

Answer 5

Extremely prolonged PR interval (300-400 ms).

Question 6

Features of AV Block: 2nd degree, Mobitz II?

Answer 6

The PR interval in the conducted beats remains constant
The P waves ‘march through’ at a constant rate
There will be some random P waves that arent followed by a QRS complex

Question 7

Features of AV Block: 2nd degree, Mobitz I?

Answer 7

P waves are constant rate at the start, then progressivley will elongate and a P wave wont be followed by a QRS complex, unlike in Mobitz type II there qill be many and random P waves with a dropped QRS complex.

Question 8

What electrocardiogram changes would you expect with catecholaminergic polymorphic ventricular tachycardia?

Answer 8

1) patients typically have a normal resting ECG
2) during exercise stress test atrial arrhythmias and/or bidirectional or polymorphic VT can occur and be used to establish the diagnosis

Question 9

What view of the heart do V1 and V2 leads look at?

Answer 9

Anterior view

Looks at the right ventricle.

Question 10

What does horizontal ST depression in leads V1-V3 indicate?

Answer 10

Posterior STEMI

Question 11

What are some features of a non-segmented myocardial infarction?

Answer 11

ST Segment Depression: One of the hallmark signs of NSTEMI. This is often observed in leads that correspond to the area of the heart affected by ischemia (usually V1-V6 and inferior leads). They are usually in contiguous leads (2 or more)
T Wave Changes: T wave inversion may also be present in the affected leads. This indicates myocardial ischemia.

Question 12

How can you see junctional rhythm on an ecg?

Answer 12

No P wave visible but a regular beat

Question 13

What is the difference in ECG between junctional rhythm and atrial fibrillation?

Answer 13

Neither have P waves

However AF will be irregular beat

Junctional rhythm will be regular beat.

Question 14

What is a Q wave and where is it found?

Answer 14

A small downward deflection before the QRS segment

Question 15

Where is it normal to find Q waves?

Answer 15

Leads V6 and II

Question 16

Where do Q waves indicate a Q wave MI?

Answer 16

In leads V1-V3

Question 17

What is Scarbossa criteria?

Answer 17

Sign of a STEMI in a pt with LBBB

Question 18

What are signs of LBBB?

Answer 18

In V1 there will be a dominant S wave (tallest wave in lead)

In V6 there will be an M shaped QRS complex

Question 19

What features will a subarachnoid haemorrhage show on an ECG?

Answer 19

ST elevations
Large U waves
Prolonged QT intervals

Question 20

What are the features of Wolff-Parkinson-White (WPW) syndrome?

Answer 20

Short PR interval
Dominant R wave in V1 and V2
Delta waves

Question 21

ECG Diagnostic Criteria for De Winter pattern?

Answer 21

Upsloping ST depression at J point
Tall symmetrical T waves in precordial leads

Question 22

What are the precordial leads?

Answer 22

V1-V6

Question 23

Wellens syndrom ECG manifestation?

Answer 23

Deeply inverted T waves in V2-V3

Question 24

What P wave changes would you expect with Right Atrial Enlargement?

Answer 24

P wave amplitude > 2.5mm in leads II, III and aVF

Question 25

Unipolar atrial polarisation features on ECG?

Answer 25

Unipolar atrial pacing is characterized by large pacing spikes followed by p waves.