Answer:
d. left ventricle
Explanation:
Heart consists of four chambers: left atrium, right atrium, left ventricle and right ventricle. The atria are located above the ventricles and their function is to pump blood to the ventricles.
Right ventricle pumps the deoxygenated blood to the lungs via pulmonary artery. Pulmonary vein brings back oxygenated blood from lungs to the left atrium. From here the blood is sent to left ventricle. Left ventricle pumps blood to the entire body via aorta. Since it has to make blood reach to every part of the body from head to toes, it generates maximum pressure. Therefore, left ventricle also has thickest heart muscles.
Answer:
B
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Subsequent INR readings are influenced by the dose, method, and initial INR of vitamin K. For intravenous vitamin K doses of 2 mg or more, INR decrease is comparable. FFP preadministration has no effect on INR readings 48 hours or more after vitamin K administration.
What is Abstract of Vitamin K dosing to reverse warfarin based on INR, route of administration, and home warfarin dose in the acute/critical care setting?
- Commonly, vitamin K is used to reverse the anticoagulant effects of warfarin. The ideal vitamin K dosage and delivery method that does not lengthen bridging therapy are still unclear.
- To ascertain the elements affecting the level and pace of vitamin K-induced INR reversal in the acute/critical care setting.
- 400 patients' charts from between February 2008 and November 2010 who got vitamin K to counteract the effects of warfarin were examined. International normalized ratios (INRs), intravenous or oral vitamin K doses, and whether or not fresh frozen plasma (FFP) was administered were among the information gathered. INRs were measured 12, 24, and 48 hours before vitamin K treatment.
- At baseline, 12 hours, 24 hours, and 48 hours, respectively, intravenous vitamin K decreased INR more quickly than oral vitamin K (5.09, 1.91, 1.54, and 1.41 vs. 5.67, 2.90, 2.14, and 1.58). Subsequent INR values were impacted by baseline INR (p 0.001), method of administration (p 0.001), and vitamin K dosage (p 0.001). For intravenous vitamin K doses of 2 mg or more, there was a similar drop in INR. Home warfarin dose had no effect on INR responses to intravenous or oral vitamin K (p = 0.98 and 0.27, respectively). FFP had no effect on INR readings 48 hours later. Although larger vitamin K doses and longer anticoagulation bridge therapy appeared to be related, neither the incidence (p = 0.63) nor the duration (p = 0.61) were statistically significant.
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