Electrocardiography for Healthcare Personnel Chapter 2.A Anatomy of the Heart

2.1 Circulation and the ECG Transports blood Muscular 2 sided pump Has electrical activity

2.2 Anatomy of the Heart Lies in center of chest Under sternum Between the lungs The size of your fist Weighs 10.6 oz or 300 grams

2.2 Heart Statistics Average beats per minute = 72 or 100,000 x’s / day or 22.5 billion times in the avg. lifetime Total output = 5 liters per minute or 1800 gallons /day

2.2 Heart Anatomy Pericardium Pericardial space Epicardium Myocardium Endocardium

Pericardium

2.2 Heart Anatomy Pericardium Pericardial space Epicardium Myocardium Endocardium

Pericardial Space

2.2 Heart Anatomy Pericardium Pericardial space Epicardium Myocardium Endocardium

2.2 Heart Layers

2.4 The Cardiac Cycle (One complete Heart beat)

2.4 Diastole – Relaxation Phase Blood returns to the heart via the superior and inferior vena cava Blood flows from the right atrium into the right ventricle Blood from the pulmonary veins flows from the left atrium into the left ventricle

2.4 Systole – Contraction Phase Contraction creates pressure, opening the pulmonary and aortic valves Blood from the right ventricle flows to the lungs Blood from the left ventricle flows through the aorta to the body

Heart Diagram A&P of the Heart, Blood Flow…

Quiz II A&P of the Heart

What is the main function of the heart? Question #1 What is the main function of the heart?

Question #2 Finish this statement… The heart is about the size of the owners __________.

Question #3 Approximately how many gallons of blood does the human heart pump every day.

Why is there fluid that fills the pericardial space? Question #4 Why is there fluid that fills the pericardial space?

One complete Heartbeat is also known as a ________ _________. Question #5 One complete Heartbeat is also known as a ________ _________.

Which phase of the heart is known as the relaxation phase? Question #6 Which phase of the heart is known as the relaxation phase?

How many chambers does the heart have? Question #7 How many chambers does the heart have?

What is happening during Systole? Question #8 What is happening during Systole?

Deoxygenated Blood enters into the heart through these 2 areas. Question #9 Deoxygenated Blood enters into the heart through these 2 areas.

Question #10 What is another name for the Left Anterior Descending Artery? (Hint: It’s a killer)