ECG

Question 1

ECG interval: measures the time between atrial and ventricular depolarization including physiologic delay in the AV junction

Answer 1

PR interval

Question 2

ECG interval: reflects duration of ventricular repolarization

Answer 2

QRS interval

Question 3

ECG abnormality
Right atrial overload

Answer 3

tall and peaked P waves (>2.5mm) in limb and precordial leads

P pulmonale

Question 4

ECG abnormality
L atrial overload

Answer 4

biphasic p wave in V1 with a broad negative component

broad >=120 ms often with notched P wave in one or more limb leads —> P mitrale