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When a patient's blood pressure remains dangerously high and left untreated, the left ventricle can develop hypertrophy. This will result in:
Question 1 options:
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Decrease of Stroke Volume |
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Increase in Preload |
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Decrease in Afterload |
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Increase in Cardiac Output |
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Solved in 3 steps
- Which of the following interventions will increase cardiac stroke volume? increased activity of cardiac sympathetic nerves increased circulating catecholamine levels increased preload decreased arterial pressureDuring which phase of the cardiac cycle is the ST segment present on an EKG? Group of answer choices Atrial systole Isovolumetric ventricular contraction Rapid ventricular ejection Isovolumetric ventricular relaxation Rapid ventricular fillingInadequate tissue perfusion in hypovolemic shock occurs due to: Question 9 options: Decrease in cardiac blood flow due to valvular disease or pericarditis Increase in intravascular volume leading to fluid volume overload Decrease in intravascular volume leading to decreased cardiac output Decrease in peripheral vascular resistance leading to decrease flow
- The cardiac action potential is substantially longer than a neuron potential due to: Question options: myocardial contractility spontaneous depolarization gap junctions Ca++ entryAn increase in which of the following would result in a larger stroke volume ? Group of answer choices End diastolic volume Heart rate Arterial blood pressureA normal patient has an ECG monitor attached to him/her as he/she starts exercises at the gym. The ECG recording shows a significant increase in heart rate to 220 beats/min after 20 minutes of strenuous exercise. What are the consequences and why? To answer this, be sure to address blood flow through the heart and what is happening to the blood flow, electrical impulses and pressures during each phase of the ECG (p,q,r,s,t).
- A class of drugs called beta-blockers are commonly prescribed to cardiac patients in order to reduce their heart rate. Beta-blockers slow heart rate by reducing the conduction of action potentials through the A-V (atrioventricular) node. The most likely effect on an ECG shorter R-R interval shorter Q-T interval longer P-R interval longer T waveIn congestive heart failure fluid is leaking from capillaries and there will be evidence of edema in some regions of the body. The reason this fluid is accumulating outside of vessels is because ________________________. Group of answer choices 1)the increased flow to the vessels resulting from the stenosis, results in greater leaking by the capillaries. 2)capillaries are porous structures, and in the event of an increased fluid volume contained within the backed up vessels (in the atrium lets say), more leakage happens. 3)the pressure in the chest increases with stenosis, and capillaries in the abdominal organs leak. 4)with lower flow of blood to the atria, fluid leaks from the ventriclesA premature ventricular contraction (PVC) indicates which of the following Group of answer choices an extra ventricular contraction arial tachycardia ventricular fibrilation none of the above
- The goal of management of the person with an acute myocardial infarction is t0 preserve the myocardium. This is accomplished by: Question 3 options: Decreasing oxygen demands and increasing oxygen supplies Monitoring the person and keeping them on bedrest for long periods of time Increasing oxygen demands and decreasing oxygen supply Giving the person multiple medications for the rest of their livesThe events of the cardiac cycle cause cyclical changes in left ventricular pressure and volume over time. Another way to represent these events is with a pressure-volume loop, as shown below. Drag the labels from the left into the appropriate boxes on the pressure- volume loop to demonstrate your understanding of the cardiac cycle. Aortic valve closure AV valve opening Systolic pressure Isovolumetric relaxation Isovolumetric contraction 120 Diastolic pressure Ventricular filling 80 End-diastolic volume Ventricular ejection 40 AV valve closure End-systolic volume Aortic valve opening 60 120 LV volume (mL) O McGraw-Hill Education Reset LV pressure (mm Hg)Which of the terms in the following pairs is correctly matched? Group of answer choices Heart contraction : systole Stroke volume : end systolic volume minus end diastolic volume End diastolic volume : volume of blood in the ventricle immediately after it has contracted Passive filling : blood moves into the ventricles because the atria contract
