Are heart failure and cardiac failure the same thing?

Written by Jia Qiu Ju
Cardiology
Updated on May 10, 2025
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Heart failure and cardiac failure are the same, but in clinical standard diagnosis, it is called heart failure, or congestive heart failure, which can be divided into left heart failure, right heart failure, and total heart failure. Heart failure is a group of clinical syndromes caused by the gradual progression and aggravation of a condition in the presence of an underlying disease. Underlying diseases include hypertension, coronary artery disease, diabetes, cardiomyopathy, myocarditis, valvular heart disease, and pericardial disease, etc. Initially, there is a significant decline in activity levels; even slightly more activity can cause chest tightness, shortness of breath, and wheezing. Severe cases may be accompanied by episodes of respiratory distress, and as the condition progressively worsens, the aforementioned symptoms can occur even at rest. Heart failure currently still utilizes the New York Heart Association functional classification, which is divided into four stages, with stage four being the most severe heart failure.

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Written by Wei Shi Liang
Intensive Care Unit
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Causes of acute heart failure include

Most patients with acute heart failure have a history of heart disease, and the common causes mainly include: 1. Acute myocardial necrosis or damage, such as acute coronary syndrome, peripartum cardiomyopathy, and myocardial damage caused by drugs or toxins, including sepsis-induced myocardial damage. 2. Acute exacerbation of chronic heart failure due to infection or other stressful factors. 3. Acute hemodynamic changes, mainly including conditions like cardiac tamponade, hypertensive crisis, aortic dissection, and acute valvular regurgitation, all of which can lead to acute heart failure.

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Written by Wei Shi Liang
Intensive Care Unit
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Why does heart failure cause edema?

Edema caused by heart failure is mainly due to heart dysfunction, resulting in systemic circulation, venous congestion, and excessive fluid accumulation in the body's tissue spaces. The primary cause is right heart failure or total heart failure, and some special cases of pericarditis. The edema caused by this type of heart failure is often symmetrical, indenting, and sagging, and usually worsens with activity and lessens with rest. The common locations for fluid accumulation are in the sacral and perineal areas, while bedridden patients often show it in the ankle area. In severe cases, patients may experience generalized edema, and even develop ascites and pleural effusion. This condition is known as heart failure, and the type of edema it causes is called cardiogenic edema.

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Written by Fan Yan Fu
Cardiology
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Why do we need to supplement potassium for heart failure?

Potassium ions are very important in the cardiac muscle cells, playing a critical role in maintaining the stability of the electrical activity of these cells. Thus, in conditions like heart failure or other cardiovascular diseases, it is essential to keep potassium levels within a certain range in order to reduce serious cardiac events. When potassium levels fall, cardiac electrical activity can become disordered, potentially leading to a sudden cardiac arrest. This is particularly the case in heart failure where the cardiac muscle cells are in a diseased state, making them more sensitive to low potassium levels. Thus, they are more prone to sudden cardiac arrest or sudden cardiac death. Therefore, for cardiovascular diseases, particularly heart failure, there is a high priority on supplementing potassium, generally increasing it to above 4.0 and even around 4.5 to be safe. Additionally, patients with heart failure often have poor diets, leading to lower potassium intake and consumption of potassium-rich foods, necessitating pharmacological potassium supplementation. Heart failure patients frequently use diuretics, which can lead to higher potassium loss, thus requiring additional potassium supplementation. For these reasons, potassium supplementation is particularly emphasized in patients with heart failure.

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Written by Wang Li Bing
Intensive Care Medicine Department
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Is acute heart failure dangerous?

Acute heart failure is very dangerous in clinical practice. It is mainly caused by a sudden decrease in cardiac output, leading to insufficient perfusion in tissues and organs and acute blood stasis syndrome. The main clinical symptoms include severe respiratory distress, often accompanied by restlessness, profuse sweating, frequent coughing with pink frothy sputum, and in severe cases, sudden cardiac and respiratory arrest can occur. After the occurrence of acute heart failure, effective measures should be taken to alleviate symptoms such as respiratory distress. The most effective methods in clinical practice include strengthening the heart, promoting diuresis, and dilating blood vessels.

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Written by Zhang Lu
Obstetrics
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Can childbirth lead to heart failure?

Childbirth refers to the delivery of a fetus through vaginal delivery or cesarean section, and it represents a significant strain on a woman’s heart. Regardless of the type of delivery, there is a possibility of leading to heart failure to some extent. Especially during the second stage of labor, pregnant women often exert greater effort, significantly increasing the load on the heart. If there is poor heart function or pre-existing cardiac disease, it could lead to heart failure. In some cases, if the heart disease is severe and cannot withstand delivery, a cesarean section must be chosen. However, cesarean delivery can also lead to heart failure, mainly due to a large amount of blood flowing back to the peripheral circulation from the uterus after the fetus is delivered, causing a significant increase in the preload on the heart and easily leading to the onset of heart failure.