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ECG ch1 A&P

Cardiology A&P

Movement of blood from the right ventricle to the lungs Pulmonary circulation
The ? supplies the right atrium and ventricle with blood Right coronary artery
The primary chemical mediator of the sympathetic division of the automatic nervous system Norepinephrine
The circumflex artery is a branch of the? Left coronary artery
Is located between the right atrium and right ventricle Tricuspid valve
The anterior surface of the heart is made up mostly of the? Right ventricle
The period during which a heart chamber is contracting and blood is being ejected is called Systole
Which of the following is primarily responsible for parasympathetic stimulation of the heart Vagus nerves
The heart chambers that receive blood Atria
The inferior surface of the heart is also called the ? Diaphragmatic surface
The heart chambers that pump blood Ventricles
The thick, muscular middle layer of the heart wall that contains the atrial and ventricular muscle fibers necessary for contraction Myocardium
Coronary artery that supplies the SA node and AV node in most of the population Right coronary artery
A semilunar valve is shaped like a Half moon
A negative ? effect refers to a decrease in heart rate Chronotropic
Innermost layer of the heart Endocardium
The amount of blood flowing into the right atrium each min from the systemic circulation Venous return
The ? septum separates the right and left atria Interatrial
A buildup of excess blood or fluid in the pericardial space can cause cardiac ? Tamponade
Specialized nerve tissue located in the internal carotid arteries and the aortic arch that detect changes in blood pressure Baroreceptors
One of the semilunar valves Pulmonic
Upper chambers of the heart Atria
The percentage of blood pumped out of a heart chamber with each contraction Ejection fraction
This typically results when the hearts demand for oxygen exceeds its supply from coronary circulation Myocardial ischemia
Sensors in the internal carotid arteries and aortic arch that detect changes in the concentration of hydrogen ions(PH) oxygen, and carbon dioxide in the blood Chemoreceptors
When actin and myosin filaments slide together, the cardiac muscle cell Contracts
In myocardial cells function as electrical connections and allow the cells to conduct electrical impulses very rapidly Gap junctions
Space between the lungs that contains the heart, great vessels, trachea, and esophagus, among other structures Mediastinum
This electrolyte is very important in cardiac muscle contraction Calcium
This type of heart valve separates an atrium and ventricle Atrioventricular
Lower heart chambers Ventricles
Pulmonary arteries and veins, aorta, superior and inferior vena cavae Great vessels
The three vessels that the right atrium receives blood from 1.Superior vena cava 2.Inferior vena cava 3. Coronary sinus
Two main branches of the left coronary artery 1. Left anterior descending 2. Circumflex artery
A the end of ventricular siastole, both atria simultaneously contract to eject 10% to 30% more blood into the ventricles Atrial Kick
The upper portion of the heart and is formed mainly by the left atrium Base
The lower portion of the heart formed by the tip of the left ventricle Apex
Part of the atria that receives blood low in oxygen Right atrium
Carries blood from the head and upper extremities Superior vena cava
Carries blood from the lower body Inferior vena cava
The largest vein that drains the heart Coronary Sinus
Part of the atria that receives freshley oxygenated blood from the lungs via the right and left pulmonary veins Left atrium
Part of the ventricles that pump blood to the lungs Right ventricle
Part of the ventricles that pump blood out to the body Left ventricle
The outside of the heart has grooves called ? the coronary arteries and their major branches lie in these grooves Sulci
It encircles the outside of the heart and separates the atria from the ventricles. It contains the coronary blood vessels and epicardial fat Coronary Sulcus
The right and left sides of the heart are separated by and internal wall of connective tissue called Septum
Part of the septum that separates the right and left atria Interatrial Septum
Part of the septum that separates the right and left ventricles Interventricular septum
The process by which the left side of the heart receives oxygenated blood and pumps it out to the rest of the body Systemic circulation
Each ventricle holds this much blood when it is full 150mls
The amount of blood ejected from a ventricle with each heartbeat Stroke volume
The percentage of the blood pumped out of a heart chamber with each contraction. normally between 50-65% Ejection fraction
Patients such as those with CHF, severe cardiomyopathy or myocardial damage from a previous heart attack are said to have and ejection fraction of less then 40% Impaired ventricular function
The innermost half of the myocardium Subendocardial area
The outermost hald of the myocardium Subepicardial area
Created by: nju9552