ECG Flashcards
The Electrocardiogram (ECG or EKG) is a
recording of electrical events in the heart
The Electrocardiogram (ECG or EKG) is obtained
by electrodes at specific body locations
The Electrocardiogram (ECG or EK
Abnormal patterns diagnose damage
P wave
Atria depolarizes
QRS complex
Ventricles depolarize
T wave
Ventricles repolarize
P–R interval
From start of atrial depolarization
* To start of QRS comple
Q–T interval
From ventricular depolarization
* To ventricular repolarization
Each big box =
= 0.2 seconds
Each little box =
0.04 seconds
5 big boxes =
1 second
Cardiac Cycle is the period
between the start of one heartbeat
and the beginning of the next
CRDIAC CYCLE INCLUDES
INCLUDES CNTRACTAION and relaxation
Two Phases of the Cardiac Cycle
Within any one chamber
1. Systole (contraction)
2. Diastole (relaxatio
Phases of the Cardiac Cycle
Atrial systole
* Atrial diastole
* Ventricular systole
* Ventricular diastole
