Unit 1 Flashcards
(81 cards)
Deoxygenated blood enters the ___ by way of
the ____ . Once the atrium is full, ____ occurs
and the blood passes through the ____ into the ___ .
Deoxygenated blood enters the RIGHT ATRIUM by way of the Superior and Inferior Vena Cava. Once the atrium is full contraction occurs and the blood passes through the TRICUSPID VALVE into the RIGHT VENTRICLE
From the right ventricle the blood passes through the _____ into the _____. The blood then passes
into smaller vessels, pick up oxygen and return to the ____ side of the heart by
way of the _____ into the _____ _____
From the right ventricle the blood passes through the PULMONARY SEMI-LUNAR VALVE into the PULMONARY ARTERY. The blood then passes
into smaller vessels, pick up oxygen and return to the **Left **side of the heart by
way of the **PULMONARY VEINS ** into the **LEFT ATRIUM. **
From the LEFT ATRIUM, blood passes though the _____ into the _____ . When the ventricle contracts it opens the ____ and blood passes into the _____.
From the LEFT ATRIUM, blood passes though the MITRAL VALVE into the LEFT VENTRICLE. When the ventricle contracts it opens the **AORTIC SEMILUNAR VALVE **and blood passes into the AORTA.
Label the diagram
- Aorta
- Right atrium
- Right ventricle
- Tricuspid valve
- Pulmonary valve
- Pulmonary artery
- Pulmonary veins
- Left atrium
- Left ventricle
- Superior vena cava
- Inferior vena cava
- Mitral valve
The heart is a __ organ located in the chest, behind the __ within the __. Two thirds of its mass is located to the __ of
the midline of the body. It has __ chambers, __ atria and __ ventricles.
The heart is a muscular fibrous organ located in the chest, behind the sternum within the mediastinum. Two thirds of its mass is located to the ** left** of the midline of the body. It has four chambers, two atria and two ventricles.
Both __ contract at the same time and both __ contract at the same time.
Atria and ventricles
The __ system is a closed system. Coordinated ___ is necessary to provide the body with a fresh
supply of oxygenated blood.
The Cardiovascular system is a **closed **system. Coordinated **contraction **is necessary to provide the body with a fresh supply of oxygenated blood.
What happens when there is a problem with the conduction system?
The muscle does not respond appropriately and blood does not flow effectively through the heart.
How is assessment of the mechanical functions of the heart done?
Measuring pulse, skin color and blood pressure
How is assessment of the electrical function of the heart is done?
Electrocardiogram.
Endocardium
Contains branches of heart’s electrical conduction system
Myocardium
made up of layers and bands of cardiac muscle fibers
Epicardium
single layer of cells supported by connective tissues; contains nerves to heart and coronary blood vessels
A-V Valves
- Tricuspid
- Mitral
Semilunar valves
- Pulmonic
- Aortic
Ventricular systole
Ventricles contract, forcing blood through the pulmonic and aortic valves to lungs and body
Atrial Systole
Atria contract, forcing blood through mitral and tricuspid valces into ventricles
Systolic phase
Contraction
Diastolic phase
Relaxation
What is the purpose of an ecg?
check for signs of heart disease
- Specifically, to diagnose a heart attack or mycardial infarction (MI)
What are indications for a 12-lead EKG?
- Chest pain
- Atypical chest pain
- Epigastric pain (heart burn)
- Back, neck, jaw, or arm pain without chest pain
- Palpitations
- Syncope
- Pulmonary edema
- Extertional dyspnea
V1 Chest lead placement
4th intercostal space to the right of the sternum
V2 Chest lead placement
fourth intercostal space to the left of sternum
V3 Chest lead placement
Directly between leads V2 and V4
