Chapter 18 Interpreting the Electrocardiogram

Label the heart part indicated by number 1 in the diagram of the impulse-conducting system of the heart.

• Superior vena cava

• Inferior vena cava

• Left ventricle

• Pulmonary artery

Label the heart part indicated by number 2 in the diagram of the impulse-conducting system of the heart.

• Right atrium

• Left ventricle

• Pulmonary artery

• Aortic valve

Label the heart part indicated by number 3 in the diagram of the impulse-conducting system of the heart.

• Left atrium

• Right ventricle

• Atrioventricular node

• Pulmonary artery

• Tricuspid valve

Label the heart part indicated by number 4 in the diagram of the impulse-conducting system of the heart.

• Right ventricle

• Left atrium

• Aorta

• Pulmonary vein

Label the heart part indicated by number 5 in the diagram of the impulse-conducting system of the heart.

• Left ventricle

• Right atrium

• Sinoatrial node

• Atrioventricular node

• Interatrial septum

Label the heart part indicated by number 6 in the diagram of the impulse-conducting system of the heart.

• Interventricular septum

• Right atrium

• Left ventricle

• Aortic valve

Label the heart part indicated by number 7 in the diagram of the impulse-conducting system of the heart.

• Aorta

• Left Atrium

• Right Ventricle

• Pulmonary Vein

Label the heart part indicated by number 8 in the diagram of the impulse-conducting system of the heart.

• Pulmonary artery

• Left atrium

• Atrioventricular node

• Right ventricle

• Mitral valve

Label the heart part indicated by number 9 in the diagram of the impulse-conducting system of the heart.

• Inferior vena cava

• Pulmonary vein

• Aortic valve

• Left atrium

• Left ventricle

Fill in the anatomical term for the conduction clue indicated by number 10 in the diagram of the impulse-conducting system of the heart.

• Sinoatrial (SA) node

• Atrioventricular (AV) node

• Bundle of His

• Purkinje fibers