EKG Anatomy and the ECG Unit Latest Edition.

EKG Anatomy and the ECG Unit Latest Edition.The stiffening of blood vessels due to fatty plaque buildup is called ____________. ANSWER- atherosclerosis Where is the heart located? ANSWER- In the left-side of the thoracic cavity What is the most common symptom of cardiac compromise? ANSWER- Angina Which wave of the ECG cycle shows atrial depolarization? ANSWER- P wave Which layer of the heart is made of muscle tissue and pumps the blood through the system? ANSWER- Myocardium Which of these tissues is known as the body's "natural pacemaker?" ANSWER- SA node Which layer of the heart contains a lubricating fluid that reduces friction as the heart beats? ANSWER- Pericardium Which of the following are groups at high risk for cardiac emergencies that may appear with atypical symptoms? ANSWER- Women, elderly, diabetics A reduction in blood flow to the heart is called ANSWER- myocardial ischemia What is a heart attack? ANSWER- When blood flow to the heart is blocked What is the contraction phase of a heartbeat? ANSWER- Systole What does an electrocardiogram measure? ANSWER- Heart function Which of these terms refers to when the electrical impulse starts in the SA node and causes the atria to contract? ANSWER- Atrial depolarization Which chamber of the heart receives deoxygenated blood from the body? ANSWER- Right atrium How long does the average cardiac cycle last? ANSWER- 0.8 seconds Which wave of the ECG cycle shows repolarization? ANSWER- T wave Which chamber of the heart contracts to send blood to the pulmonary artery and lungs? ANSWER- Right ventricle