Exercise 31 - Conduction System of the Heart & The ECG

Exercise 31 - Conduction System of the Heart & The...

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Richland College Biol. 2402 th Edition EXERCISE 31 – CONDUCTION SYSTEM OF THE HEART & THE ECG OBJECTIVES 1. To identify the 4 parts of the intrinsic conduction system. 2. To identify depolarization and repolarization of atria and ventricles in the electrocardiogram, noting the P, QRS, and T waves on the recording. 3. To calculate heart rate and the length of 1 cardiac cycle using an ECG performed in lab. 4. To understand the basic methodology of an ECG. 5. To recognize normal and abnormal ECGs. ACTIVITY 1a: ECG Basically, how does the machine monitor the heart function? What does the X axis represent? What does the Y axis (height of inflection) represent? Can you identify the 3 basic parts of the cardiac cycle on the ECG? What do they represent? Using a section of ECG from lab, determine the number of cardiac cycles per minute (you will need to know the time measurements on the X-axis of the ECG) and the time of 1 cardiac cycle. The speed of the ECG recording is 25mm per second. One cardiac cycle l--------------------l Look at the examples ECGs on your table to identify problems. SKIP ACTIVITY 1b: BIOPAC NOTE : Interactive Physiology CD or access to www.interactivephysiology.com INTERACTIVE PHYSIOLOGY CARDIOVASCULAR SYSTEM – Excellent review! Excellent physiology: the conduction system, blood pressure, cardiac cycle, and ECG.
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Exercise 31 - Conduction System of the Heart & The...

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