med surg III, EKG

What is the pacemaker of the heart

Sinoatrial node (SA Node)
What is the purpose of the AV Node

To slow down conduction and Allow atrial contraction and ventricular filling
what is occurring during the P wave

atrial depolarization
what is the beginning of the atrail depolarization to the beginning of ventricular depolarization called(beginning of P wave to beginning of QRS complex)

PR interval or PRI
how long should the PR interval last

0.12-0.20 seconds
what is occurring during the QRS complex

ventricular depolarization and Atrail repolarization

QRS complex is the amount of time it takes the ventricles to contract
how long should a normal QRS complex

0.06-0.12 second
what does a widening QRS complex indicate(QRS complex greater than 0.12 seconds)

ventricle dysfunction
what is the period Between ventricular depolarization and the beginning of ventricular repolarization called

ST segment
what does An ST Seg elevation greater than 2mm indicate

myocardial injury
ST segment depression 2millimeters or more indicates what

myocardial injury or Ischemia
what is worse and why myocardial injury or myocardial Ischemia

injury because injury is non reversible. Ischemia can be reversed when Oxygenation to the tissue is restored

Author

tville01

237648

Card Set

med surg III, EKG

Description

Med surg III

Updated

2013-09-29T15:02:53Z

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