Module 5 Flashcards
What are the 2 main structures of the cardiovascular system ?
Heart and blood vessels
Heart pumps 100,000 times a day.
What is the general pathway of blood between body and heart?
12 pieces
Body capillaries, Venules, veins, heart, pulmonary artery, lungs, lung capillaries, pulmonary vein, aorta, artery, arterioles, capillaries
What cavity is the heart located ?
In the thoracic cavity
Specifically in the pericardial cavity (this space is also called the mediastinum)
Where is the mediastinum located?
In the space between the two pleural cavities and contains organs between the pleural cavities .
What are the three layers of the heart?
Endocardium, myocardium, pericardium
Describe the 3 layers of the heart
Endocardium: inner lining of heart
Myocardium: muscular middle layer
Pericardium: outer sac that surrounds heart and decreases friction between heart and surrounding structures
Function of the right side of the heart?
Left side of the heart?
Right side: pumps blood from body tissue to the lungs
Left side : pump blood from lungs to the body tissues
What structure divides the 2 sides of the heart?
Septum
What are the 2 chambers of the heart?
Atrium and ventricle
Left and right atrium
Left and right ventricle
What structures brings blood to the right atrium ?
Superior vena cava
inferior vena cava
Function of right ventricle?
Right lower portion
Receives blood from right atrium and pumps it into the pulmonary trunk and the right and left pulmonary arteries
Function of left atrium ?
Left upper portion
Receives oxygenated blood from the right and left pulmonary veins
Function of the Left ventricle?
Left lower portion
Received blood from the left atrium and pumps it out the large artery, the aorta.
What are the four valves of the heart?
Tricuspid valve
Pulmonary valve
Mitral valve (bicuspid valve)
Aortic valve
Purpose of heart valves?
Separates the four chambers
- located at the exit and entrance of each ventricle
- controls the flow of blood from one area to another
Located between right atria and right ventricle
Tricuspid valve
Located at the exit of the right ventricle and controls blood flow from right ventricle to the pulmonary trunk
Pulmonary valve
Located between left atrium and left ventricle
Mitral valve
Located at the exit of the left ventricle
Aortic valve
Explain blood circulation journey in the heart.
-blood enters heart from superior/inferior vena cava into the right atria
-travels through tricuspid valve into the right ventricle
-leaves right ride of heart through pulmonary valve into left/right pulmonary artery into the lungs
-oxygenated blood removed from lungs via right/left pulmonary veins
-enters left side of heart at the left atrium
-travels through the mitral valve into the left ventricle
-leaves heart through aortic valve and enters aorta
- from aorta, blood is dispersed to the body tissues
Large veins that drain all blood from upper and lower body to right atrium
Superior and inferior vena cava
Only artery to carry deoxygenated blood
Right and left pulmonary artery
Only vein to carry oxygenated blood
Pulmonary vein
Blood vessels that carry blood away from heart to the body tissues
Arteries
Smallest arteries, only consisting of one to two cell layers of muscle cells
Arterioles
Capillary bed
Microscopic blood vessels where o2 and nutrients are delivered to the cells of the body and co2 and other waste products are removed from the cells of the body.
Connects arterioles to venules
Capillary bed
Smallest veins, one to two muscle cell layers thick
Venules
Blood vessels that return the blood to the heart
Veins
Major arteries of the body (19)
-Right/left common carotid artery
-right/left subclavian artery
-ascending aorta
-aortic arch
-brachial artery
-renal artery
-abdominal aorta
-radial artery
-ulna artery
- common/internal/external iliac artery
-femoral artery
-anterior/posterior tibial artery
-popliteal artery
-perineal artery
Major veins of the body (25)
-internal/external jugular vein
-superior/inferior vena cava
-hepatic portal vein
-superior mesenteric vein
-ulnar vein
-radial vein
-common/internal/external iliac vein
-digital veins
-femoral vein
-great saphenous vein
-popliteal vein
-posterior/anterior tibial vein
-fibular vein
-subclavian vein
-right/left brachiocephalic veins
-cephalic vein
-brachial vein
-basilic vein
-median cubital vein
-renal vein
Heartbeat
-Coordinated contraction of the heart
-begins 5-6 weeks after conception
Stimulates the heart muscle to contract continuously and rhythmically
Neuromuscular tissue
List of neuromuscular tissue of the conduction system ?
Sinoatrial node
Atrioventricular node
Bundle of his
*purkinje fibers
Sinoatrial node (SA node)
Pacemaker of the heart, made of a dense collection of purkinje fibers at the upper part of the right atrium
Describe the Pathway of electrical impulses (6)
Sinoatrial node
Intermodal pathway
Atrioventricular node
Bundle of his
Bundle branches
Purkinje fibers
Electrocardiogram (EKG,ECG)
What is its purpose?
Measures electrical activity of the heart
Diagnostic tool used to detect abnormalities in the heart, such as ischemia or arrhythmias.
Most common site to measure the pulse? Where is it located?
Radial pulse
Located on the thumb side of the wrist
Carotid pulse
Easiest pulse to palpate and is commonly used in an emergency
Dorsalis pedis pulse
Located on dorsal surface of the foot
Used to assess peripheral artery disease
Normal pulse
60-100 BPM
Common pulse points (7)?
Temporal
Carotid
Brachial
Radial
Femoral
Popliteal
Dorsalis pedis
Blood pressure
Measurement of the pressure that the blood exerts against the arterial wall as the heart pumps and the resistant force of the arterial wall against that blood flow.
Two measurements for blood pressure?
Systolic and diastolic blood pressure
Explain Systolic and diastolic blood pressure?
Systolic: measurement of pressure when heart contracts and blood is pumped to the body
Diastolic: measurement when heart is relaxed
Normal blood pressure
Less than 120/80 mmHg
Measures blood pressure
Sphygmomanometer
Explain the process and physiology of checking blood pressure?
Arrhythmia
Change in or lost of the regular rate and rhythm of the heartbeat
Another name for arrhythmias
Dysrhythmias
Symptoms of arrhythmias (5)
Syncope or near syncope
Dizziness
Fatigue
Palpitations
Asymptomatic
Consequences of arrhythmias
Sudden Cardiac death
Severe decrease in cardiac output that can damage heart and brain
Sinus arrhythmias
Arrhythmia that is a normal finding in a patient ; typically do not cause severe symptoms
Sinus tachycardia
Irregularity in heart rate where heart rate is greater than 100 BPM
This is typically a normal response to exercise
Common causes of sinus tachycardia
Exercise
Infection
Pain
Anxiety
Anemia
Thyroid disease
Heart disease
Sinus bradycardia
Defined as heart rate below 60 BPM
Normal for pts who exercise regularly
In patients with underlying heart disease or elderly patients, A problem with the SA node or a side effect of a medication
Some causes of sinus bradycardia
Atrial fibrillation
Irregular heart rhythm where the electrical conduction of the heart no longer begins at the SA node, but the start of the electric conduction of the heart comes from many different locations throughout the atria.
-Fast arrhythmia
-Atria twitches irregularly , and the ventricles respond irregularly.
Most common chronic arrhythmia
Atrial fibrillation
Symptoms of atrial fibrillation
Short of breath
Palpitations
Increased risk of developing stroke
May not feel arrhythmia at all
Ventricular tachycardia
Arrhythmia where contraction is initiated in the ventricles , rather than the atria
Fast, over 100 BPM
Symptoms of ventricular tachycardia
Palpitations
Dyspnea
Lightheadedness
Death, if not treated properly
Treatment for ventricular tachycardia
Cardioversion
Cardioversion
Medical procedure to treat life threatening arrhythmias
Regular heart rate and rhythm are restored after an electric shock is applied to the heart
Treatment for atrial fibrillation
Medications to slow heart rate as well as cause the blood to not clot as easily
Surgical ablation
Pacemakers
Ablation
Destroys part of atria that are sending irregular electric signals
Pacemakers
Devices surgically implanted in patients Chet cavity to stimulate the heart with electronic impulses.
Imitates a heartbeat where the SA node is not working properly
Coronary Artery Disease
Result from atherosclerosis, which is the build up of fatty material or plaques in the arteries of the heart.
Most common type of heart disease
Number one cause of death in the USA
Coronary Artery Disease
Risk factors of coronary artery disease
Positive family history
Male sex
Abnormal blood lipids
Diabetes mellitus
Hypertension
Physical inactivity
Abdominal obesity
Cigarette smoking
Alcohol
Poor diet