testing
This test evaluates:
how well the heart is moving
how well the valves are working
the size of the heart and it's pumping chambers (ventricles)
it is an ultrasound
echocardiogram
what is a normal blood pressure?
120/80
States that the force of cardiac contraction is directly proportional to the initial length of the muscle fibers at the beginning of contraction
Starling's law
This is considered the GOLD STANDARD to document the presence of coronary artery disease
coronary arteriography
What is stroke volume a measure of?
Amount of blood ejected with each ventricular contraction
it is about 70 mL / beat
The resistance the heart must overcome to eject blood from the left ventricle into systemic circulation is known as?
afterload
A noninvasive test that studies the heart during activity and detects and evaluates coronary artery disease
Treadmill testing is the most commonly used mode
Stress testing
what is it? Exercise on a treadmill or bike until ischemic ECG changes, angina, or dyspnea occur
How much blood volume is circulated in the body every minute?
about 5 L
The degree of stretch of the cardiac muscle fibers in the ventricles before they contract is known as?
Preload
What can be done for a patient who can not exercise on a treadmill to perform a stress test, but needs this test done?
provider will order persantine (dypridamole thallium): for patients unable to exercise because produces dilation of coronary arteries and simulates as if the body were to exercise
What is ejection fraction a measure of?
Percent volume of blood ejected with each ventricular contraction. It is about 55% - 75% of total ventricular volume.
This is the most important factor in ventricular performance since it plays a role in how much blood is ejected, the end systolic volume, and the systolic ejection fraction.
myocardial contractility
This is a noninvasive test in which the client wears a monitor and an ECG tracing is recorded continuously over a period of 24 or more hours
It identifies dysrhythmias if they occur and evaluates the effectiveness of antidysrhythmic or pacemaker therapy
Holter monitoring
What is the formula for cardiac output?
Stroke volume (SV) x heart rate (HR)=CO
These are specialized sensory receptors that detect changes in blood pressure and are located in key blood vessels and chambers of the heart including the carotid sinus, and the aortic arch.
Baroreceptors