Myocardial ischemia is a cardiovascular disease with clinical symptoms such as angina pectoris and myocardial infarction caused by hypoxia of myocardial tissue due to insufficient blood supply of coronary artery. Early and accurate diagnosis of myocardial ischemia is of great significance for selecting appropriate treatment options and predicting patient prognosis. Traditional diagnostic methods such as electrocardiogram and cardiac angiography have certain limitations, while medical ultrasound scanners have become a non-invasive examination tool and play an important role in the diagnosis of myocardial ischemia.

1、 The principle of medical ultrasound scanner

Medical ultrasound scanners utilize the differences in propagation speed and echo intensity of ultrasound in different tissues to generate images by receiving and processing echo signals, thereby achieving observation of internal organs in the human body. It can obtain images of different levels and directions by changing the position and angle of the probe, thereby comprehensively understanding the structure and function of organs.

2、 Application of medical ultrasound scanner in the diagnosis of myocardial ischemia

1. Observe coronary artery blood flow

The direct cause of myocardial ischemia is insufficient blood supply to the coronary artery, so observing the blood flow of the coronary artery is very important for the diagnosis of myocardial ischemia. Medical ultrasound scanners can use Doppler ultrasound imaging technology to observe the blood flow velocity, direction, and morphology of coronary arteries in real-time. By measuring parameters such as systolic and diastolic blood flow velocity and resistance index of the coronary artery, it is possible to evaluate the blood supply to the coronary artery and preliminarily determine whether there is myocardial ischemia.

2. Analyze the motion and contraction function of the myocardial wall

Myocardial ischemia can lead to abnormal movement and contraction of the myocardial wall. Medical ultrasound scanners can observe the movement of myocardial walls in real-time, such as displacement, velocity, and deformation at the end of diastole and contraction. By analyzing the amplitude of myocardial wall movement and changes in systolic function, the degree and extent of myocardial ischemia can be evaluated. In addition, medical ultrasound scanners can also evaluate the systolic function of the ventricles and the severity of myocardial ischemia by measuring the velocity and flow velocity time integral of the cardiac outflow tract.

3. Detecting myocardial perfusion

Myocardial ischemia can lead to insufficient blood supply to the myocardium, and medical ultrasound scanners can observe myocardial perfusion through contrast-enhanced ultrasound technology. Contrast-enhanced ultrasound is the process of injecting small bubbles into the patient's body, forming a bright echogenic signal that clearly displays the blood flow dynamics of the myocardium. By observing the perfusion of the myocardium, the blood supply status of the myocardium can be evaluated, helping to diagnose myocardial ischemia.

3、 The advantages of medical ultrasound scanners in the diagnosis of myocardial ischemia

1. Non invasive

Compared with traditional diagnostic methods, medical ultrasound scanners are a non-invasive examination method that eliminates the need for intubation and contrast agent injection, reducing the risk of discomfort and complications for patients.

2. High safety

Medical ultrasound scanners use sound waves without radiation or chemical stimulation, and have no side effects on the human body. They can be reused.

3. Easy to operate

Medical ultrasound scanners have the characteristics of simple and fast operation. With simple training, doctors can proficiently operate and obtain high-quality images.

4. Real time imaging

Medical ultrasound scanners can observe the movement and blood flow of the myocardium in real-time, providing doctors with more important information about myocardial ischemia and helping to improve the accuracy of diagnosis.

conclusion

Medical ultrasound scanners, as a non-invasive and radiation free examination tool, play an important role in the diagnosis of myocardial ischemia. It can observe coronary artery blood flow, analyze the movement and contraction function of the myocardial wall, and detect myocardial perfusion, providing doctors with intuitive and reliable examination results. However, medical ultrasound scanners still have some limitations in the diagnosis of myocardial ischemia, such as poor resolution of fine structures. Therefore, in clinical applications, it is necessary to combine it with other examination methods to achieve more accurate and comprehensive diagnostic results.