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42 Cards in this Set
- Front
- Back
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The pericardium has 2 parts?
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– Fibrous Pericardium
– Serous Pericardium |
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What part of the pericardium is that outer inelastic portion that prevents overstretching of the heart?
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Fibrous Pericardium
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What part of the pericardium is the inner double layer?
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Serous Pericardium
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The serous pericardium has 2 parts?
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– Parietal Layer
– Visceral Layer |
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With the serous pericardium, what layer fuses it to the fibrous pericardium?
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Parietal Layer
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With the serous pericardium, what layer attaches it to the heart?
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Visceral Layer(epicardium)
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What are the 3 layers of the heart wall?
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– Epicardium
– Myocardium – Endocardium |
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What layer of the heart wall is the outer layer?
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Epicardium
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What layer of the heart wall is the cardiac muscle "bulk" of the heart?
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Myocardium
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What layer of the heart wall is the inner lining of the heart?
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Endocardium
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Cardiac muscle fibers in each network are connected by _____ discs that contain _____ junctions?
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– Intercalated
– Gap |
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The left ventricle is the _____ chamber, and has the _____ workload?
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– Thickest
– Greatest |
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With the heart vessels, the right side has deoxygenated blood that is delivered to the right atrium by the coronary sinus (vein) from the?
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Myocardium
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Deoxygenated blood pathway?
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– Right Atrium
– Right Ventricle – Pulmonary Trunk – Right and Left Pulmonary Arteries – Lungs |
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With the heart vessels, the left side is where the _____ _____ deliver oxygenated blood from the lungs?
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Pulmonary Veins
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Oxygenated blood pathway?
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– Left Atrium
– Left Ventricle – Aorta – System |
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What prevents backflow of blood into atria in response to pressure changes?
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Atrioventricular Valves (AV)
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The atrioventricular valves (AV) are between the _____ & ______?
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-Atria
-Ventricles |
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Atrioventricular valves?
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– Left AV
– Right AV |
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What AV is bicuspid (mitral)?
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Left AV
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What AV is tricuspid valve?
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Right AV
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AV valves, bicuspid and tricuspid open during ventricle _____ (_____)?
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Relaxation (filling)
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What heart valve disorder is most common, and is where the the valve protrudes into the left atrium during ventricular contraction, causing backflow of blood?
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Mitral Valve Prolapse (MVP)
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Reduction of blood flow to myocardium
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-Myocardial Ischemia
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Squeezing sensation of ches "strangled chest"
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Angina Pectoris
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Death of a heart muscle (heart attack)
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Myocardial Infarction
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Conduction system contains cardiac cells that depolarize (fire) ______________.
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Automatically
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At rest, _______________ nervous system slows SA node to ____ beats/minute
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*Parasympathetic
*75 |
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Recording of heart current.
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ECG or EKG
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On an ECG, Atrial depolarization (contraction = __ _____>
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P Wave
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On an ECG, VEntricular depolarization (contraction) masks atrial repolarization =
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QRS Complex
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On an ECG, Ventricular repolarization (relaxation) =
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T-Wave
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Alternately contracts & relax; force blood from higher to lower pressures (more space)
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Atria & Ventricles
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=Ventricular diastole (expansion) Ventricular pressure drops below artrial pressure & AV waves open -> Ventricular filling starts
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T-wave
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=Artrial Systole (contraction) Completes centricular filling
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=P-Wave
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Volume of blood ejected per minure from each ventricle
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Cardiac Output (CO)
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Blood ejected per beat
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Stroke Volume (SV)
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Beats per minute
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Heart Rate (HR)
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Formula for Cardiac Output
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CO=SV + HR
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Within limits, the more the heart is filled (stretched), the stronger the force of contraction -> increases SV
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Frank-Starling Law
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Fluid in lungs; left ventricle fails
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Pulmanory Edema
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Swelling in feet & ankles; right ventricles fails
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Peripheral Edema
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