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Heart failure (HF), also known as congestive heart failure (CHF), is a syndrome caused by an impairment in the heart's ability to fill with and pump blood.. Although symptoms vary based on which side of the heart is affected, HF typically presents with shortness of breath, excessive fatigue, and bilateral leg swelling. [3]
Notable causes of prerenal AKI include low blood volume (e.g., dehydration), low blood pressure, heart failure (leading to cardiorenal syndrome), hepatorenal syndrome in the context of liver cirrhosis, and local changes to the blood vessels supplying the kidney (e.g. NSAID induced vasoconstriction of afferent arteriole).
It was previously believed that low cardiac output in heart failure patients results in decreased blood flow to the kidneys which can lead to progressive deterioration of kidney function. As a result, diuresis of these patients will result in hypovolemia and pre-renal azotemia.
Acute kidney failure due to hypovolemia: the loss of vascular fluid into the tissues (edema) produces a decreased blood supply to the kidneys that cause a loss of kidney function. Thus it is a tricky task to get rid of excess fluid in the body while maintaining circulatory euvolemia.
Hypotension, also known as low blood pressure, is a cardiovascular condition characterized by abnormally reduced blood pressure. [1] Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood [2] and is indicated by two numbers, the systolic blood pressure (the top number) and the diastolic blood pressure (the bottom number), which are the ...
Recent evidence from clinical trials has also linked variation in blood pressure to mortality, [66] [67] stroke, [68] heart failure, [69] and cardiac changes that may give rise to heart failure. [70] These data have prompted discussion of whether excessive variation in blood pressure should be treated, even among normotensive older adults.