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CARDIAC ARRHYTHMIAS
Clk. Alexander L. Gonzales IIDecember 14, 2010
SINUS RHYTHM
>60bpm and <100bpm
P-wave in front of QRS
QRS is narrow Rhythm is regular
CARDIAC ARRHYTMIAS
BRADYARRHYTHMIAS
SINUS BRADYCARDIA
Slow heart beat (<60bpm)
Normal rhythm, but slow
P wave is present QRS is narrow
SINUS PAUSE
SA node stops working
Pause in heart beat for 6-8s
CARDIAC ARRHYTHMIAS
PREMATURE BEATS
ATRIAL PREMATURE CONTRACTION QRS is normal P-wave is present
but looks different on the premature beat
AV NODAL PREMATURE CONTRACTION = JUNCTIONAL
No P-wave before premature beat b/c originates in AV node, not atria
QRS is normal
PREMATURE VENTRICULAR CONTRACTION
Every other beat is abnormal (ventricular bigemini)
One QRS complex and P-wave are normal
Next QRS is wide and T-wave is inverted (-) repolarization is abnormal
CARDIAC ARRHYTMIAS
SUPRAVENTRICULAR TACHYCARDIAS
SINUS TACHYCARDIA
>100bpm Normal P-wave Narrow QRS
ATRIAL TACHYCARDIA
P-wave is inverted (-)
2 P-waves per every QRS complex
AV NODAL REENTRANT TACHYCARDIA
No P-wave b/c it’s within QRS complex
QRS is narrow, looks normal but is faster
Regular rhythm
PREEXCITATION: WOLFE PARKINSON WHITE SYNDROME
Slurred upslope on QRS and wider complex
PR is shorter -wave (pts. prone to
SVTs) Tachycardia pathway:
AV node accessory pathway atrium (-wave disappears, but will return once HR)
SVT WITH SHORT RP (REFRACTORY PERIOD)
QRS is narrow 1:1 relationship
b/w P-wave and QRS
Can see P-wave before QRS
ATRIAL FLUTTER
Regular and reproducible
QRS is narrow See (-) complexes Saw tooth pattern
ATRIAL FIBRILLATION
Disorganized rhythm
Pulse is irregularly irregular/irregular rhythm
QRS is narrow No P-wave
VENTRICULAR TACHYARRHYTHMIA
Occur in bottom chambers
>3 PVC in a row V-tach Nonsustained stops
after a certain time period
No P-waves Repolarization is
abnormal QRS complexes are wider More QRS than P-waves
TORSADES DE POINTES
Long QT interval QRS complexes
are all over the place look abnormal
VENTRICULAR FIBRILLATION
Complete disorganization
No P-waves No QRS complexes