Chap 248 : Arrythmias Flashcards
1
Q
Wandering Pacemaker ?
A
Change in site impulse formation in sinoatrial node under parasympathetic tone
Respiratory sinusal arrythmia
↑ P wave when HR ↑
2
Q
Cardiac heart failure and respiratory sinusal arrythmia ?
A
CHF ↑ sympathetic tone : abolish RSA
If CHF and RSA : another disease may be present to ↑ parasympathetic tone
3
Q
Ventriculophasic sinus arrythmia ?
A
2nd or 3rd degree AV block
→ P-P shorter after QRS complex
4
Q
Sinus bradycardia
A
Secondary ++
Asphyxiation (upper airway obstruction, BSOR), ↑ vagal tone (GI, respiratory, neuro diseases), hypothermia, deep anesthesia
Primary (rare) sick sinus syndrome
