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Transcript
The Cardiac cycle and the ECG David Taylor [email protected] Outcomes • Understand the pressure changes that occur in the heart • Describe the electrical basis of the ECG • Explain why the heart sounds occur when they do • Predict the effect on the ECG of left ventricular infarct. Case • Mr Gibson is taken straight into the emergency room in the local casualty department, given oxygen, pain relief, and attached to a cardiac monitor. Mrs Gibson is very concerned about her husband. Dr Smith from the coronary care unit (CCU) tells her that the most likely cause is a heart attack. I used these books Cardiac Cycle ECG and excitation Understanding the Q-wave Case..... • The pathologist’s report shows “occlusion of the left coronary artery with a full thickness infarct of the left ventricular wall”. Understanding the Q-wave Pressures in the heart ECG, pressures and sounds Outcomes • Understand the pressure changes that occur in the heart • Describe the electrical basis of the ECG • Explain why the heart sounds occur when they do • Predict the effect on the ECG of left ventricular infarct. Cardiac Cycle
