A patient has been diagnosed with heart failure and cardiac output is decreased. Which formula can the nurse use to calculate cardiac output?
Ventricular filling time/diastolic filling time
Stroke volume x heart rate
Myocardial contractility x myocardial blood flow
Preload/afterload
The Correct Answer is B
A. Ventricular filling time and diastolic filling time are not formulas used to calculate cardiac output; they pertain to the phases of the cardiac cycle.
B. Cardiac output is calculated by multiplying stroke volume (the amount of blood ejected by the heart with each beat) by heart rate (the number of beats per minute). This formula accurately reflects the overall volume of blood the heart pumps in one minute.
C. Myocardial contractility and myocardial blood flow are important factors in cardiac function but do not directly provide a formula for calculating cardiac output.
D. Preload and afterload are factors that affect stroke volume but are not used to calculate cardiac output directly.
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Correct Answer is C
Explanation
A. Increased cholesterol levels are not directly related to garlic intake or the effects of warfarin.
B. Distended jugular veins may indicate fluid overload or heart failure but are not a direct concern related to warfarin and garlic interaction.
C. Garlic can enhance the anticoagulant effect of warfarin, increasing the risk of bleeding; therefore, monitoring for signs of bleeding is crucial.
D. Angina is not a direct consequence of the interaction between garlic and warfarin and does not specifically relate to the assessment for this patient.
Correct Answer is B
Explanation
A. Increasing activity level may be unrealistic for a patient on strict bed rest due to a pelvic fracture.
B. Repositioning every 2 hours is a realistic and achievable goal for a patient on bed rest to prevent complications such as pressure ulcers and maintain circulation.
C. Using a walker for ambulation may not be feasible immediately after a pelvic fracture.
D. Transferring with a sliding board may not be safe or appropriate in the early stages post-injury, especially if bed rest is required.