L2: Basics waves, complexes, intervals, HR Flashcards
(20 cards)
P pulmonale
right atrial enlargement
p wave amplitude >2.5 mm
wide (>.10 sec) p wave
P mitrale
left atrial enlargement
First part of p wave=
Second part of p wave=
1st= right atrial depolarization 2nd= left atrial depolarization
Tall peaked notched large T wave
atrial tachycardia
p wave gets hidden in T wave
“F” waves
flutter waves
“f” waves
fibrillitory waves
Flutter (F) waves rate
250-350 bpm
“saw-toothed pattern”
Flutter waves
Fibrillitory (f) waves rate
> 350 bpm
wave, chaotic looking baseline
lack of discernable p waves
Fibrillitory (f) waves
More p waves than QRS complexes
some p waves blocked and didn’t reach ventricles
retrograde depolarization of atria
inverted p waves
Wide-Bizarre QRS complexes of supraventricular origin
Right or left bundle branch block→ intraventricular conduction defect
Aberrant QRS conduction
Electrical impulses reach bundle branch while it is still refractory→ impulse travels down unaffected bundle branch first, followed by the other→ wide
Short PR interval
impulse originates close to AV junction
OR
impulse arises from a supraventricular site but travels through abnormal accessory pathways to the ventricles→ premature ventricular depolarization→ pre-excitation
Delta wave
“slurred” upstroke in QRS complex
seen in abnormal accessory pathways causing short PR interval
2 reasons PR interval could varry
Wandering atrial pacemaker
(random)
2nd degree AV heart block type one
(longer until one is dropped)
In atrial fibrillation or flutter, PR interval is
absent
In ventricular dysrhythmias, PR interval is
absent
In 3rd degree heart block, PR interval is
not measureable
P waves and QRS are not associated with each other
