Cardiac Valves
Along with the pulmonary valve, this valve is semilunar
What is the aortic valve?
The first upward wave on an ECG
What is the P wave
What is the mediastinum?
The first two coronary arteries that branch off of the aorta
What are the RCA and the LMCA?
What is the sinoatrial node?
This valve is named after a hat that the Pope wears.
What is the mitral valve?
This "complex" on an ECG represents ventricular contraction
What is the QRS complex
This is the layer of the heart is continuous with the inner layers of the aorta and pulmonary trunk
What is the endocardium?
This artery is nicknamed "The Widowmaker"
What is the LAD artery?
Pacemaker cells of the heart exhibit this quality
What is autorhythmicity?
These valves have chordae tendineae ("heart strings") attached to them.
What are the atrioventricular valves?
This is where the atria repolarize on an ECG
What is in the QRS complex
There are two layers to this heart covering
What is the (parietal and visceral) serous pericardium
Two branches of the left main coronary artery
What are the circumflex and the LAD?
During the pacemaker cell action potential, the rapid depolarization phase is due to influx of this ion into the cell
What is calcium?
Damage to this valve causes blood to regurgitate into the left atrium.
What is the mitral valve?
This many leads are placed on a patient's chest to perform a standard ECG
What are nine?
Usually, the heart extends from the 2nd rib to...
What is the 5th intercostal space?
Coronary veins drain into this common venous reservoir
What is the coronary sinus?
This cardiac conduction region traverses the atria and ventricles
What is the Bundle of His?
During systole (ventricular muscle contraction), these valves are closed
What are the atrioventricular valves?
If elevated or depressed from baseline, this segment may indicate someone is having a heart attack
What is the S-T segment?
Most of the anterior portion of the heart consists of this chamber
What is the right ventricle?
Blood travels in the coronary circulation during this phase of cardiac contraction
What is diastole?
What is 0.1 ms?