ECG Flashcards
(16 cards)
Find ECG rate (3)
300 divided by number of large squares between two adjacent QRS complexes
Cover 1/3 of rhythms strip with hand
Number of QRS complexes in the strip x10
What is the PR interval, and how long should it be?
0.2 seconds - end of p to start of q
QRS interval time and description
0.12 seconds. Start of q to end of s.
Right Axis Deviation
Lead I negative
Lead II positive
Left Axis Deviation
Lead I positive
Lead II negative
No Axis Deviation
Lead I and II positive
Left Bundle Branch Block (3)
Broad QRS (over 0.21s)
Deep S wave in V1
No Q wave in V5/6
Assume MI if there’s chest pain and lbbb is new
Cant make further diagnostic decisions with the ecg if lbbb is there.
Right bundle branch block (3)
Broad QRS
RSR pattern in V1 (m shapes)
Surred S wave in lateral leads I, V5, V6
Rapid Atrial fibrillation
Irregularly irregular with no p waves
1st Degree heart block
Constantly prolonged PR
2nd degree heart block, Mobitz 1
Regularly irregular
HR ~60
Narrow QRS
Increasing PR interval, until theres a missed QRS
2nd degree heart block, Mobitz type 2
Rate around 85, occasionally dropping to 38
Narrow QRS
PR interval is constant until a QRS complex is dropped
3rd Degree Heart Block
No relation between p waves and QRS complexes
Atrial Flutter
Saw tooth appearance if p waves.
Rate around 150
Narrow QRS
Supraventricular Tachycardia
BPM of up to 300!
Regular rhythm
Narrow QRS
No clear p waves - theyve merged with the previous t waves.
Ventricular tachycardia
Regular rhythm
300 bpm
Broad QRS
No clear p waves
