Term
| What does the p-wave represent? What is happening in the heart at this point as a result? |
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Definition
Atrial depolarization
The atria are constricting and pumping blood into the ventricles. |
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Term
| What does the QRS complex represent? |
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Definition
Ventricular Depolarization
The ventricles are constricting and pumping blood to the lungs from the right ventricle (pulmonary circulation), and to the rest of the body in the left ventricle (via aorta) |
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Term
| Why is atrial repolarization not seen on an ECG? |
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Definition
| It is masked by (happens at the same time as) the QRS complex |
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Term
| What does the T wave represent? |
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Definition
| Ventricular Repolarization |
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Term
| What does ECG stand for and why is it sometimes called an EKG? |
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Definition
| ECG stands for electrocardiogram, and the abbreviation EKG is due to the ECG being invented in Germany where cardio is spelled with a K (kardio). |
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Term
| What is the normal path of action potential conduction? (6) |
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Definition
| SA node→ atrial muscle → AV node→ bundles of His → purkinje fibers → ventricular muscle |
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Term
| What are the two nodes of the heart? |
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Definition
Sinoatrial Node (SA-Node): Pacemaker Located in the Posterior Wall of the Right Atrium
Atrioventricular Node (AV-Node): Mass of Conducting Fibers Between The Atria And Ventricles |
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