Supraventricular Arrhythmias Flashcards
Some characteristics of fascicular and idioventricular rhythms ?
They are associated with low blood pressure, are unstable, and can transition abruptly into pulseless electrical activity or asystole with cardiac arrest.
Which ectopic beats are referred to as supraventricular ?
Beats originating in the AV junction or atria.
Some characteristics of atrial flutter ?
The flatter waves occur at very regular intervals and are identical-in-appearance in any lead recording.
How fast is the atrial rate during typical atrial flutter ?
Around 300/min (range about 240-330 cycles/min)
Which is the best lead to identify AF ?
Lead V1, where the irregular f waves are most likely to be seen.
How fast is the QRS rate in untreated AF at rest ?
Over 100/min at rest, with often abrupt, inappropriate increases during exercise.
How long is the minimal duration required for thrombus formation in cases of arrhythmia ?
At least 48 hours.
