EXAM #1: CHAMBER ENLARGEMENT

Question 1

What are the primary etiologies of atrial enlargement?

Answer 1

1) Mitral or tricuspid valve disease (reguritation= increased BV)
2) Ischemia
3) HTN

Question 2

What is a LA conduction abnormality called?

Answer 2

“P mitrale”

Previously thought that the cause was ALWAYS mitral valve disease

Question 3

What is a RA conduction abnormality called?

Answer 3

“P pulmonale”

Previously though the cause was ALWAYS pulmonary valve disease

Question 4

What are the characteristics of RAA?

Answer 4

Tall/peaked p-waves in II and V1 (0.25mV)

Question 5

What are the characteristics of LAA?

Answer 5

II= broad (greater than 0.12sec) and notched 
V1= Biphasic or monophasic p-wave (wider and deeper than 1 box)

Question 6

What are the two etiologies of ventricular enlargement?

Answer 6

1) Hypertrophy

2) Chamber dilation

Question 7

What are the criteria for RVH?

Answer 7

1) Tall right precordial R-waves (abnormal R-wave progression)
2) RAD
3) T-wave inversion in right precordial leads*

With normal QRS duration, ST depression with UPWARD convexity and T-wave inversion

Question 8

What are the criteria for LVH?

Answer 8

1) S-wave in V1 + R-wave in V5 or V6 greater than 35mm

2) R-wave in aVL greater than 11mm