EKG Lab Flashcards
What’s happening in the P wave?
Atria in systole (contracting)
Ventricles in diastole (relaxing)
What’s happening in QRS complex?
Ventricles in systole (contracting)
Atria in diastole (relaxing)
What’s happening in T wave?
Ventricles in diastole (relaxing)
Atria in diastole (relaxing)
Describe the ‘lub’ heart sound.
This is when the AV valve closes, as the ventricles start contracting due to an increase in intraventricular pressure, atria are in diastole
Describe the ‘dub’ heart sound
This is when the pressure in the left ventricle decreases to less than the aorta (semilunar valve shuts), pressure in the aorta is 80 and ventricle is 0
What is happening when someone has a heart murmur?
Their valves are leaking
AV valve is not shutting properly
What happens when there is a missing or abnormal P wave?
Dysfunctional SA node, may need a pacemaker
What happens when there is a prolonged P-R interval?
Conduction problem from AV node
What problem can occur in the QRS complex?
Ventricle problem
Increased R spike
Bigger ventricles
What’s the problem in the S-T interval?
Decreased = decreased oxygen delivery
Increased = acute MI (myocardial infraction)
What happens when thers’s a problem in the T wave?
Heart diseases
____ is a problem with the speed or rhythm of the heartbeat
Arrhythmia (tachycardia or bradycardia or with an irregular rhythm)
What causes congestive heart failure?
A. the heart can’t pump blood the way it should
B. the heart can’t fill with enough blood
C. the heart can’t sent blood to the rest of the body with enough force (cardiac decompensation)
What are congenital heart defects?
Problems with the heart’s structure that are present at birth, changing the normal flow of blood through the heart
What is mycardial infraction and what does it result from?
Heart attack
Prolonged corornary blockage
