Chamber Enlargement

Question 1

What is the ECG changes seen in LVH?

Answer 1

Deepest of V1 or V2 + Tallest of V5 or V6 > 35mm.

Often associated with LAH.

Question 2

What is the ECG changes seen in RVH?

Answer 2

V1 or V2 taller than they are deep (R > S).

Often associated with RAH.

Question 3

What is the ECG changes seen in LAH?

Answer 3

P-mitral.
Pwave > 0.12s.
M shaped Pwave (gap > 0.04s).

Question 4

What is the ECG changes seen in RAH?

Answer 4

P-pulmonale. Pwave > 2.5mm tall.

Peaked shape.

Question 5

What occurs in Hypertrophic Cardiomyopathy?

Answer 5

Thickening of heart walls.

Normally genetic.

Question 6

What occurs in Dilated Cardiomyopathy?

Answer 6

Stretching of heart walls without thickening.

HTN etc causes

Question 7

What are the ECG changes seen in RV strain pattern?

Answer 7

Concave downward ST.
Flipped asymmetrical T in V1 or V2.
Can also be indicated by S1Q3T3.

Question 8

What are the ECG changes seen in LV strain pattern?

Answer 8

Concave downward ST.
Flipped asymmetrical T in V5 or V6.

Note: Reciprocal ST elevation to strain may look like STEMI, but MI is flat with symmetrical Twaves, not concave & asymmetrical.

Question 9

What occurs in Cor Pulmonale?

Answer 9

RVH (chronic cases) or RV dilation (acute cases) due to pulmonary HTN.

Question 10

What are the possible ECG signs of PE?

Answer 10

RV strain pattern.

S1Q3T3.

Question 11

What is S1Q3T3?

Answer 11

Swave in lead I
Qwave in lead III
Flipped Twave in lead III