Cardiac Rhythms Flashcards
WPW
- Bypass pathway of NL SA–>AV pathway (Bundle of Kent)–> premature ventricular contraction
- Predisposes to tachyarrhythmias
- Wide QRS
- Slurred delta wave
Hypokalemia
ST depression
Flatted T
U wave
Hyperkalmeia
Peaked T Waves
Hypocalcemia
Prolonged QT interval
Hypercalcemia
Short QT
Digitals Toxicity
Gradual downward curve of ST segment, lowest point below baseline
Pericarditis
- ST elevation w/ T wave flattening or inversion
- Similar to STEMI, but will see in multiple leads
PSVT
- Regular Rhythm, fast rate 150-200bpm. Narrow QRS
- Rapid onset and subsequent resolution.
- Palpitations, SOB, dizziness, syncope
Sinus Arrhythmia
Normal sinus with slight variation 2/2 inspiration/expiration
PVC
- Wide, bizarre QRS (2/2 ventricular depolarization not following NL pathway)
- Bigeminy= 1NL beat: 1 PVC
- Trigeminy= 2NL beats: 1 PVC
VTach
Run of 3+ PVCs
Rate ~120-200
VFib
No CO
A Flutter
Saw tooth
A fib
No P wave.
Irregularly irregular
Premature atrial contraction
Ectopic, supraventricular beats
Right Bundle Branch Block
1) Wide QRS
2) RSR’ (rabbit ears) in V1
Left Bundle Branch Block
1) Wide QRS
2) Long R
1st Degree AV block
-All beats conducted, but PR interval >0.2s
2nd degree AV block
Mobitz type 1 (Wenckebach)
- Only some beats conducted to ventricle
- Progressive prolongation of PR interval until QRS dropped
2nd degree AV block
Mobitz type 2
QRS dropped w/o prolongation
3rd degree AV block
Complete dissociation between Atria and ventricles. Each driven by independent pacemakers.
-P waves march through QRSs
Sick sinus Syndrome
Combo of sinus arrest w/ alterations of paroxysms of atrial tacky and brady arrhythmias
Tx: Pacemaker and AICD
