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Terms in this set (57)elastic artery Carry blood away from the heart Muscular Artery Deliver blood to specific body organs Arterioles Smallest arteries led to capillaries Capillaries Smallest vessels mostly arranged in capillary beds, which exchange of materials between the blood and the interstitial fluid. Venules Formed when capillaries unite Veins Transport blood towards the heart The heart is a muscle that works continuously, like a pump each beat is set in motion by an electrical signal, initiated by autorhythmic cardiac cells within the heart muscle. The autorhythmic cardiac cells initiate and distributes action potentials throughout the heart muscle (making it beat) autorhythmic the heart produces its own pulses through electrochemical stimuli originating from a small group of cells in the wall of the right atrium Heart Rate The number of times the heart beats in ONE minute Heart Rate Unit BPM (Beats per Minute) Average adult HR at rest 75 BPM HR> 100 BPM called Tachycardia HR < 60 BPM called Bradycardia Stroke Volume The amount of blood pumped by EACH ventricle with each heartbeat SV= EDV-ESV End Diastolic Volume (EDV) the amount of blood in each ventricle at the end of diastole End Systolic Volume The amount of blood in each ventricle at the end of systole Cardiac Output (CO) The amount of blood pumped out by each ventricle in one minute Cardiac Output is directly related to HR and SV CO = SV x HR Cardiac Output units Liters per minute P wave Electrical - depolarization of atria P R segment Represents the action potential delayed at the AV node QRS complex Electrical - depolarization of ventricles Q wave Represents the action potential traveling to the bundle of His and through the bundle branches R wave Represents the action potential traveling to the Purkinje fibers and the contraction of the LEFT ventricle S wave Represents the action potential traveling to the Purkinje fivers leading to the mechanical contraction of the right ventricle ST Segment Represents the completion of Ventricular depolarization T wave Electrical- repolarization of
ventricles R-R interval Each beat of the heart produces the reading above- so they come in a sequence. The R-R interval is the time between the R waves of adjacent beats. Systolic Pressure Maximum pressure your heart generates when pumping blood through your arteries to the rest of your body (pressure exerted by the blood against the artery walls) Normal systolic pressure 120 mmHg Diastolic Pressure Lowest pressure exerted by the blood against the artery walls. Normal diastolic pressure 80 mmHg dicrotic notch The interruption of smooth flow due to the brief backflow of blood that closes the aortic semilunar valve when the ventricles relax. pulse pressure Throb felt when taking a pulse Normal pulse pressure 30-40 mmHg Mean Arterial Pressure (MAP) Calculated average pressure in the arteries Normal MAP pressure 70-105 mmHg BP = CO x TPR If heart rate increases, what changes would you expect to see in the ECG The R-R interval decreases How are an interval and a segment different? An interval measures at least one wave and one flat area, while a segment includes only a flat area of the tracing Correct placements in the Einthovens triangle arrangement? One on each wrist and one on the left ankle How should the blood pressure cuff be positioned on the patient? The hoses on the cuff should be facing anterior and exiting the cuff toward the hand. Normal expected blood pressure for an adult is less than 115/70. What do the numbers indicate when writing blood pressure? The top number (115) is systolic pressure; the bottom number (70) is diastolic pressure. Systolic pressure is recorded when Korotkoff sounds are first heard. . Diastolic pressure is recorded when Korotkoff sounds are no longer heard. Why should the cuff not be inflated beyond 20-30 mmHg above expected value? Overinflation of the cuff may result in injury to the patient. What happens to the location of blood when you stand up compared to lying down? Blood will pool in the lower limbs due to gravity. Why does blood pressure increase with exercise then lower after 5 minutes? Increased blood pressure helps to ensure muscle tissue has adequate blood supply during exercise. When exercise is over, the oxygen demands increase. What do you predict would happen to a person's blood pressure when they go from standing to lying down? Blood pressure would decrease lying down. In which of the following locations did you palpate a significantly faster pulse rate? None. Location does not affect pulse rate. Pulse rate determined by heart. Why take the pulse rate again after 5 minutes? After lying down. Body takes time to compensate for the new body position. Do you expect the pulse rate to change when the patient stands up? Yes. I expect the pulse rate to increase. Why did the pulse rate decrease 5 mins after exercise? Tissue demand for oxygen has decreased. How did the intensity of pulse pressure change with the artery's proximity to the heart? Arteries closest to the heart have a greater pulse intensity. Which change in body position resulted in the largest change in heart rate as detected by pulse rate? Sitting to standing position Students also viewedBlood Pressure - Cardiovascular Physiology26 terms hoganmb21 H&P Lab Exam 246 terms mattie018 lab test 266 terms morgancox84Plus Final BIO 12193 terms trevyip15 Sets found in the same folderPulse Rate - Cardiovascular Physiology23 terms hoganmb21 Chapter 3658 terms summernicole120 respiratory system starting with carina6 terms annettecoleman Chapter 1947 terms hmadi2011 Other sets by this creatorexamples55 terms maddiekordecki tracts15 terms maddiekordecki Receptors37 terms maddiekordecki Last Minute Review50 terms maddiekordecki Other Quizlet setsGlobal midterm68 terms mbadey99 Microbiology Final Exam Prep453 terms loveumuchmore Viruses, Bacertia, Archaea65 terms dliu23Plus History Mid-Term87 terms Jonathan_OBrien What is the top number in a blood pressure reading called?Systolic blood pressure, the top number, measures the force the heart exerts on the walls of the arteries each time it beats. Diastolic blood pressure, the bottom number, measures the force the heart exerts on the walls of the arteries in between beats.
What is the top number in a blood pressure reading called quizlet?Blood pressure readings are given in two numbers. The top number is the maximum pressure your heart exerts while beating (systolic pressure), and the bottom number is the amount of pressure in your arteries between beats (diastolic pressure).
What is the most important number on your blood pressure the top or the bottom?Q. When I am monitoring my blood pressure, which number is most important — top, bottom, or both? A. While both numbers in a blood pressure reading are essential for diagnosing and treating high blood pressure, doctors primarily focus on the top number, also known as systolic pressure.
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Which of the following is the top number in a blood pressure reading quizlet?
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