CV - ARS arrhythmias Flashcards
what is the atrial rate of sinus tachycardia?
100-180 bpm
what is the atrial rate of reentrant SVTs?
140-250 bpm
what is the atrial rate of focal atrial tachycardia?
130-250 bpm
what is the atrial rate of atrial flutter?
180-350
what is the P wave morphology of sinus tachycardia?
normal
what is the P wave morphology of reentrant SVTs?
hidden or retrograde
what is the P wave morphology of focal atrial tachycardia?
differs from normal P
what is the P wave morphology of atrial flutter?
“saw-toothed”
what is the response of sinus tachycardia to carotid sinus massage?
atrial rate may slow
what is the response of reentrant SVTs to carotid sinus massage?
may abruptly terminate
what is the response of focal atrial tachycardia to carotid sinus massage?
AV block may increase, doesn’t usually revert?
what is the response of atrial flutter to carotid sinus massage?
AV block may increase
describe a third degree AV block
P waves are present at a regular, fast rate
widened QRS present at a much slower rate
no relationship between P waves and QRS
describe a premature atrial beat
P waves are present and followed by a QRS
QRS is narrow and mostly regular, but one P wave and QRS are early
the early P wave looks different (might be difficult to discern difference) from the others
describe atrial tachycardia
P waves preceding a narrow QRS in a very rapid, regular rhythm
160-220 bpm
describe junctional tachycardia
no visible P waves
narrow, regular QRS
describe premature ventricular beats
wide QRS
inverted T waves
no P wave preceding abnormal beat
describe ventricular tachycardia
very fast rhythm
wide QRS
no visible P waves
is torsades de pointes a form of ventricular tachycardia or a ventricular fibrillation?
ventricular tachycardia
describe torsades de pointes
wide complexes
very rapid rate
no P waves
sinusoidal pattern
describe atrial flutter
extremely rapid, regular “picket fence” or “saw-tooth”
P wave rate 240-320 bpm
regular narrow QRS at a rate of 100 bpm
P:QRS ration 2:1 or 3:1 or 4:1
