Human Physiology Homework: Cardiovascular Your patient is a male, 65 years old, with history of heart disease, presented to you with a symptom of shortness of breath on exertion. You decide to perform 2 tests - coronary arteries angiography and electrocardiogram (ECG). Problem 1. Angiography a. b. Draw a heart, include both atria, both ventricles, 4 valves, aorta, pulmonary artery, pulmonary vein, superior and inferior vena cava. You inject a marker into the superior vena cava. Follow the marker until it reaches coronary arteries Problem 2. ECG a. b. Draw an ECG trace. Mark P-wave, QRS complex, and T-wave. Under the ECG trace draw the heart at the corresponding point of heart cycle. For example, the time between QRS complex and T-wave corresponds to ventricular contraction, therefore draw ventricles contracted and atria relaxed. Problem 3. Discuss differences and similarities between cardiac and skeletal muscles. Problem 4. An overweight 75 year old male with a history of coronary artery disease and shortness of breath on exertion celebrates his granddaughter wedding. He goes for several fast dances with the bride, after which he collapses on the floor, turns blue, and dies within minutes. What is the reason for his death?