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Definition
| Upper chambers that receive blood returning to the heart. Atrial contractions, with a gravity assist, push blood into the ventricles. |
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Definition
| Upon contraction, push blood from the heart into the arterial system. Most muscular part of the heart. |
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Definition
| Prevent backflow of the blood. The contracting chambers must generate enough pressure to force the valve open. When contraction is over, the pressure falls and the valves close. |
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Definition
| the valve on the right side seperating the right atrium from the right ventricle. |
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Definition
| Strongest valve. It can be a leaky valve. |
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Definition
| Seperates the right and left sides of the heart. |
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Definition
| Smaller upper part of the septum. |
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Definition
| bigger lower part of the septum. Stronger and larger to withstand the strong ventricular contraction |
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Definition
| Outer most layer of the heart. Carries cardiac vessels. Stores fat. Contact with pericardial layers. |
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Definition
| Muscular layer of the heart. Thickest layer. Creates the strongest electrical signal on ECG. Contains the sub-endocardial layer, which invest the Purkinje fibers. |
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Definition
| Thin-inner layer. Surface is often called- glass like |
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Definition
| The heart sits where the top is at the right and the bottom is toward the left. |
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Definition
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Definition
| The pressure created in the arteries nby the contraction of the left ventricle |
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Definition
| Once the left ventricle has fully contracted it begins to relax and refill with blood from the left atria. The pressure in the arteries falls whilst the ventricle refills. |
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Term
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Definition
S1= first heart sound-usually louder (lub)
S2=second heart sound (dub) |
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Term
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Definition
| 60-100 bpm when the body is resting the organs need a reduced amouont of blood and oxygen flow. When the body is active the muscle and tissue need an abundant supply of blood and oxygen- resulting in raised blood pressure/increased HR and Pulse |
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Term
| Where is the conduction system found? |
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Definition
| between the myocardium and the endocardum |
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Term
| Cardiac Conduction System |
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Definition
This pathway is made up of 5 elements:
1. The sino-atrial node (sa node) 2. The atrio-ventricular node (av node) 3. The bundle of His 4. The left and right bundle branches 5. The Purkinje fibers |
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Term
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Definition
| Is fast. Release of teh action potential across the cell membrane. It`s what causes the contraction of the muscle (heart) |
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Term
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Definition
| Is slow. Reestablishment of the membrane potential. Relaxation of teh muscle (heart) |
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Term
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Definition
| Set of membrane potential where the cell is commited to teh contraction. |
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Term
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Definition
| Transmission of electrons down a physical pathway. Nerves are sending impulses. Think like a wire. The electrical flow in the heart is due to the Conduction between cardiac cells. |
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Term
| SA Node (sinoatrial node) |
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Definition
| High in the upper right atrium. Pacemaker of the heart. Sets off AV node. Spontaneously creates Action Potential. Fires off at 60 to 100 bpm |
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Term
| AV Node (atrioventricular node) |
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Definition
| Lower left side of right atrium. Backup Pacemaker. SA Node sets it off. Fires off at 40 bpm. |
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Definition
| Carries the electrical signal into the septum down the bundle branches |
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Definition
| Carries signal into the bulk of the ventricular mass. R Bundle branch- responsible for nothing. L Bundle branch- responsible for contacting the septum. |
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Term
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Definition
| Tree like network of high speed. Spreads charge everywhere. |
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Term
| How are the electrical signals of the heart related to teh heart as a pump? |
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Definition
| The electrical signal causes muscle contraction. |
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Term
| Right Ventrical pumps at what rate? |
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Definition
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Term
| Left Ventrical pumps at what rate? |
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Definition
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Term
| What does the ECG tracing represent? |
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Definition
| the movement of electricity through the heart not the flow of blood. |
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Definition
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Definition
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Term
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Definition
| ventricular repolarization |
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| What carries blood away from the heart? |
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Definition
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Term
| What carries blood towards the heart? |
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Definition
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Definition
| when a valve turns inside out |
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Definition
| are more muscular than atria. Work harder to push against the systemic blood pressure and are larger. |
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Term
| To what specialist might a patient with accumulation of serious fluid and gas in the pericardium be referred? |
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Definition
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Term
| The inner most layer of the heart is called the: |
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Definition
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| What is the fomula for determining the CO (cardiac output)? |
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Definition
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| What activity in the heart is responsible for the first heart sound? |
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Definition
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Term
| Blood returning to the heart is oxygenated, therefore, the blood is entering the heart via the: |
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Definition
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Term
| The cardiac output is the product of HR and: |
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Definition
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Term
| What are teh semilunar valves? |
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Definition
| pulmonic valve and aortic valve |
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Term
| What are teh semilunar valves? |
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Definition
| pulmonic valve and aortic valve |
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Term
| What are teh semilunar valves? |
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Definition
| pulmonic valve and aortic valve |
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