EKG Basics and Morphology Flashcards
PR interval time
120-200ms
PR segment time
50-120ms
QRS complex time
80-120ms
ST segment time
80-120ms
T wave time
160ms
P wave time
80ms
Pathological q wave morphology
> 30ms width and 1/4 the height of R wave. Present in V1,2,3.
Leads II, III, and aVF represent what anatomical location of the heart?
Inferior leads
Leads V1 and V2 represent what anatomical location of the heart?
The septal leads
Leads V3 and V4 represent what anatomical location of the heart?
Anterior leads
Leads I, aVL, V5 and V6 represent what anatomical location of the heart?
The lateral and high lateral leads.
Left Main Coronary Artery bisects into what?
Cx and LAD
Right Coronary Artery turns into what?
Posterior Descending Artery
Cx Artery supplies what anatomical structures of the heart?
Lateral and high lateral
LAD artery supplies what anatomical structures of the heart?
Septum, anterior, and apex.
Right Coronary Artery supplies what anatomical structures of the heart?
RV, and posterior and inferior (PDA).
Normal septal depolarization is in what direction?
Left to right.
What is right dominant circulation of the coronary arteries?
PDA is supplied by the RCA (80%).
What is left dominant circulation of the coronary arteries?
PDA is supplied by the Cx (15%)
What is co-dominant circulation of the coronary arteries?
PDA is supplied by both the RCA and Cx (rare).
Narrow QRS origin
Supraventricular origin
Broad QRS origin
Ventricular in origin or due to aberrancy of supraventricular origin (hyperK, BBB, Na channel block etc.)
