What is the purpose of oxygen administration in patients with acute myocardial infarction?

Jun 09, 2023 Source: Cainiu Health

Dr. Tian Hongbo

Introduction

In general, the purpose of oxygen therapy in patients with acute myocardial infarction is to enhance myocardial oxygen supply, improve myocardial metabolic status, and reduce the area of myocardial damage. During acute myocardial infarction, coronary artery occlusion leads to myocardial hypoxia, resulting in myocardial cell injury and necrosis. Oxygen administration increases the concentration of oxygen in the blood, thereby enhancing oxygen delivery to the myocardium and alleviating myocardial hypoxia.

In general, the purpose of oxygen therapy for patients with acute myocardial infarction is to enhance myocardial oxygen supply, improve myocardial metabolic status, and reduce the area of myocardial damage. The specific details are as follows:

1. Enhance Myocardial Oxygen Supply

During acute myocardial infarction, coronary artery blockage leads to myocardial hypoxia, resulting in myocardial cell injury and necrosis. Oxygen therapy increases the concentration of oxygen in the blood, thereby enhancing oxygen delivery to the myocardium, alleviating myocardial hypoxia, and reducing the extent of myocardial damage.

2. Improve Myocardial Metabolic Status

During acute myocardial infarction, myocardial cell metabolism is impaired, leading to insufficient energy production and adverse effects such as acidosis. Oxygen therapy increases intracellular oxygen partial pressure in myocardial cells, promotes aerobic metabolism, improves myocardial metabolic function, and helps alleviate acidosis.

3. Reduce Myocardial Infarct Size

Myocardial hypoxia during acute myocardial infarction can lead to an expansion of the area of myocardial cell necrosis. Oxygen therapy reduces the degree of myocardial hypoxia, thereby limiting the size of myocardial damage and decreasing the severity of myocardial necrosis.

It should be noted that oxygen therapy must be adjusted and monitored according to each patient's specific condition. Oxygen therapy should be administered strictly as prescribed by a physician. Patients should not alter the oxygen concentration or duration on their own to avoid potential adverse effects.

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