Sinus Rhythms and extrasystole beats Flashcards
Sinus tachycardia Rate
> 100bpm but
Sinus tachycardia Rate
> 100bpm but
Sinus tachycardia rhythm
normal, but variable RR interval
sinus tachycardia P wave
visible before each QRS
Sinus tachycardia PR interval
normal
Sinus tachycardia QRS complex
normal
Sinus tachycardia causes
Anxiety, exertion, pain, drugs, fever, hypoxia, CHF, PE, MI, hyperthyroidism, pheochromocytoma, blood loss/anemia/shock, thyrotoxicosis, ETOH, abnormal electrolytes, dehydration, pneumothorax, cardiac tamponade
Sinus bradycardia rate
Sinus bradycardia rhythm
regular
Sinus bradycardia P wave
visible before each QRS
Sinus bradycardia PR interval
normal
Sinus bradycardia QRS complex
normal
Sinus bradycardia causes
drug induced, sinus arrhythmias, SA node block, Sick Sinus, AV block; 2o: electrolyte disturbances, ischemia, vasovagal, intracranial causes, poisoning, hypothyroid, obstructive jaundice, starvation, OSA, infections, carotid sinus hypersensitivity syndrome
Sinus arrhythmia rate
beat to beat variation
sinus arrhythmia rhythm
normal to slightly irregular
Sinus arrhythmia P wave
normal
Sinus arrhythmia PR interval
normal
Sinus Arrhythmia QRS complex
normal
Sinus arrhythmia causes
respiration
Sinus pause/arrest rate
normal, until the pause
sinus pause/arrest rhythm
normal, until the pause
sinus pause/arrest P wave
visible before each QRS
sinus pause/arrest PR interval
normal, until the pause
sinus pause/arrest QRS
normal, when present
Sinus pause/arrest causes
chest pain, SOB, decreased level of consciousness, hypotension and shock, pulmonary congestion, CHF, acute MI, hyperkalemia, valag hyperactivity, medications
Hyperkalemia characteristics
peaked T waves and short P waves
PAC rate
can be normal until extrasystole
PAC rhythm
irregular
PAC P wave
premature, present and included in extrasystole (different look)
PAC PR interval
normal to longer
PAC QRS
normal to narrow
PAC causes
Associated with RBBB, usually idiopathic and benign, catecholamine excess, hypoxia, myocardial ischemia, CHF, acid-base disturbance, electrolyte abnormality
PJC rate
can be normal
PJC rhythm
regular with extrasystole, no compensatory pause
PJC P wave
absent or inverted in extrasystole
PJC PR interval
absent or short