Symptoms of sinus bradycardia - ANS ✓syncope, chest pain, pale/cool skin,
hypotension, weakness, angina, dizziness, confusion, SOB
SA node firing >100 BPM
Regular rhythm
Normal P and QRS
QT <0.35 (shortened) - ANS ✓sinus tachycardia
The nurse knows that exercise, fever, pain, hypotension, hypovolemia,
anemia, hypoxia, hypoglycaemia, myocardial ischemia, HF, hyperthyroid,
and anxiety can all cause - ANS ✓sinus tachycardia
Why may sinus tachycardia cause angina? - ANS ✓inc O2 consumption in the
heart
Sinus brady Tx - ANS ✓atropine (anticholinergic) (if that doesn't work-
dopamine, epi)
Atrial tachydysrhymia
Recurring, regular, COARSE, SAWTOOTH-SHAPED waves
Caused by one single point in the R atrium
Regular rhythm
BASIC DYSRHYTHMIAS
, 2
BASIC
PR interval unmeasurable
QRS normal
May see some AV block - ANS ✓atrial flutter
What is the risk with an atrial dysrhythmia? - ANS ✓loss of atrial kick, so drop
in CO (can cause HF); risk for clot formation (stroke/PE because of blood stasis)
What is an atrial dysrhythmia pt given prophylactically and why? - ANS
✓warfarin to prevent clots
Atrial flutter/fibrillation Tx - ANS ✓CCB, BB, electrical cardioversion,
amiodarone
Total disorganization of electrical activity due to multiple ectopic places
firing inappropriately. Loss of effective atrial contraction and loss of atrial
kick.
P waves replaced by chaotic FINE waveforms
Irregular rhythm
PR unmeasurable - ANS ✓atrial fibrillation
Prolonged time of AV conduction, could be caused by RCA MI . Takes longer
for a signal to get from SA -> AV, causing bradycardia and a drop inco - ANS
✓AV block
Ectopic stimuli on ventricles fire prematurely.
Early QRS with no P waves.
Irregular rhythm
Wide QRS: >.12 seconds
Large T wave in the opposite direction of the QRS.
Compensatory pause afterward - ANS ✓PVC
BASIC DYSRHYTHMIAS
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