Rhythm Abnormalities Flashcards
Sinus arrhytmia
Sinus rhythm in which the PP interval varies by 0.16 sec or more
Sinus bradycardia?
Sinus rhytm with heart rate less than 60bpm
Sinus tachycardia?
Sinus rhythm with Heart rate greater than 100bpm
Wandering atrial pacemaker within sinus node?
Sinus rhythm with minor variation in P wave morphology remaining upright in lead I and II and inverted in aVR.
The PR interval is variable but remains 0.12 sec or greater.
Wandering atrial pacemaker to the AV junction?π±
Sinus rhythm with progressive alteration in P wave configuration becoming inverted and retrograde.
The PR interval of the AV junctional focus characteriscally becomes less than 0.12 sec.
Sinus arrest or pause? π²
A failure to the SA node to initiate an impulse, which result in absence of P wave or QRS complex .
The pause is not a multiple of the intrinsic PP interval.
Sinoatrial exit block?πΎ
An abnormality in the transmission of the sinus impulse, which result in the delay or failure of production of a P wave.
Only second degree SA block can be identified.
It may manifest in 2 patterns:
-type 1 second degree: progressive shortening of the PP int prior to an absent P
-type 2 second degree: pause on the PP cycle that is and exact multiple of the intrinsic sinus rate.
Sinus rhythm
Positive p wave in I, II, aVF and negative or biphasic in V1
Extra: less 3mm duration
Less 2.5 amplitude
Best seen II and V1
Etopic atrial rhythm
Rhythm is initiated by an atrial pacemaker other than the sinus node.
Its characterized by a rate less than 100betas with a different P wave morphology that of the sinus node. Normal PRi
Atrial premature complexes..normally conducted?
A premature complex originating in the atrium and characterized by a P wave morphology different from the normal sinus complex.
The PRi of the PAC may be shorter or longer or no different from the sinus complex.
The PRi characteristically is more than 0.12 sec, which h helps to distinguish a PAC of AV junctional origin.
APC with aberrantly conducted? π€
An APC that because of partial refractoriness of conduction system, is conducted to ventricle in an abnormal fashion and result in an alteration of in the normal morphology of the QRS complex.
Sinoatrial block?
Transient failure of impulse conduction to the atrial myocardium , resulting in intermittent pauses between P waves.
The pauses are the length of two or more P-P interval.
Multifocal atrial tachycardiaβ¦? MAT π
An atrial rhythm at rate 100bpm or greater characterized by the absence of one dominant pacemaker and P waves of at least 3 different morphology.
Multifocal atrial rhythm.?
An atrial rhythm at a rate less 100bpm and characterized by the absence of one dominant pacemaker and P waves of at least 3 different morphologies.
Atrial tachycardia, regular conduction 1:1, sustained..??
A supraventricular arrhythmia characterized by abnormal P waves and an atrial rateof 100-200bpm.
Sustained indicates a rhythm that last 30secs or more (the entire tracing).
