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] The severity of the heart failure is mainly decided based on ejection fraction and also measured by the severity of symptoms.[7] Other conditions that have symptoms similar to heart failure include obesity, kidney failure, liver disease, anemia, and thyroid disease.[7] Common causes of heart failure include coronary artery disease, heart attack, high blood pressure, atrial fibrillation, valvular heart disease, excessive alcohol consumption, infection, and cardiomyopathy.[4][6] These cause heart failure by altering the structure or the function of the heart or in some cases both.[6] There are different types of heart failure: right-sided heart failure, which affects the right heart, left-sided heart failure, which affects the left heart, and biventricular heart failure, which affects both sides of the heart.[11] Left-sided heart failure may be present with a reduced ejection fraction or with a preserved ejection fraction.[10] Heart failure is not the same as cardiac arrest, in which blood flow stops completely due to the failure of the heart to pump