Chapter 17 - Cardiovascular Emergencies Flashcards
What is the SA node and where is it located?
Upper portion of the atrium, primary pacemaker, generates the impulse that triggers the heart to contract
What is Americas number one killer?
Heart disease
What is the AV node and where is it located?
At The walls that separate the upper and lower chamber, only creates an impulse if the SA node fails
What are purkinje fibers and where are they located?
Through out the heart, deliver an impulse if both the SA and AV node fail
What is a P wave?
The first wave on an ECG that represents the depolarization of the atria, contraction
What is QRS complex?
The second waveform of an ECG that represents the depolarization (contraction) of the ventricles and the main contraction of the heart
What are T waves?
The third waveform of an ECG that represents the repolarization ( relaxation ) of the ventricles
What is atherosclerosis?
A condition that causes the smallest of arterial structures to become stiff and less elastic
What is ACS.
Acute coronary syndrome, a condition in which the coronary arteries are narrowed or occluded by fat deposits, clots or spasm
What is angina?
Pain in the chest caused by activities, the pain usually goes away with rest
What is an MI or AMI?
Acute myocardial infarction, when a portion of heart tissue dies due to a lack of oxygenated blood
What is an aortic aneurysm
A weakened section of the aortic wall begins to balloon outward from the pressure exerted by the blood flow and my suddenly rupture
What is an aortic dissection?
A tear in the inner lining of the aorta where blood enters the opening and causes separation of the layers of the aortic wall
What is heart failure?
When the heart no longer has the ability to adequately eject blood out of the ventricles, can be left or right
What is cardiogenic shock?
When the left and right ventricles fail to produce enough blood to meet the demands of the body
