>100 (100-150)
normal sinus rhythm
Premature Atrial Contraction (PAC)
an irregular and often very fast heart rate originating from abnormal conduction in the atria
irregular beating of the atria; often described as “a-flutter with 2 to 1 block or 3 to 1 block”
an irregular and often very fast heart rate originating from abnormal conduction in the atria
irregular beating of the atria; often described as “a-flutter with 2 to 1 block or 3 to 1 block”
Premature Junctional Contraction
Inverted p wave or hidden p wave
PRI<0.12 or none
Normal QRS
Supraventricular Tachycardia (SVT)
2nd degree heart block type 1 (Wenkebach)
Progressively longer PR interval until the P wave is not followed by a QPR
2nd Degree Heart Block (Mobitz II)
no obvious correlation between p and qrs, need pace maker
premature ventricular contraction (PVC)
a ventricular contraction preceding the normal impulse initiated by the SA node (pacemaker)
PVC occurring in pairs, no adequate C.O. when this occurs
monomorphic ventricular tachycardia
presents with wide QRS complexes of a common shape.
Ventricular fibrillation (V-fib)
abnormal heart rhythm which results in quivering of ventricles
Accelerated Idioventricular Rhythm
Rate: 50 – 100 usually (usually slow)
P wave: Obscured by ventricular waves (occur during ventricular contraction) – SA node slower than faster ventricular pacing than should be
QRS: Wide QRS
Conduction: Ventricular only
Rhythm: Regular
– benign rhythm that is sometimes seen during acute MI or early after reperfusion. – Rarely sustained, does not progress to vfib, rarely requires treatment
absence of contractions of the heart
Failure to capture (pacemaker)
ventricular contractions which occur in cases of complete heart block.
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