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Physiological function of left atrial appendage

Physiological function of left atrial appendage

Regulation of pressure and volume load: There are thick comb muscles in LAA, whose characteristics are similar to those of ventricular muscle cells and skeletal muscle cells. 4. Therefore, the active contraction function and compliance of LAA are much stronger than the rest of LA. Hemodynamic examination during surgery showed that clamping LAA could lead to an increase in immediate LA mean pressure and diastolic blood flow velocity of mitral valve orifice and pulmonary vein orifice. Therefore, when LA pressure and volume load increase, LAA plays an important role in regulating its hemodynamics.

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2023

01-12

Simply understand what is left atrial appendage

Simply understand what is left atrial appendage

The protruding part of the left atrium in the front right direction is called the left atrial appendage. There is no obvious boundary between this part and this part of the atrium, but the inner wall of the atrium is smooth, and the comb muscle of the inner wall of the auricle is developed but not smooth.

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2023

01-12

Clinical significance of intracardiac shunt

Clinical significance of intracardiac shunt

The difference of blood oxygen content in the right cardiac cavity exceeds the reference value, indicating that there is left-to-right shunt. Left to right shunt>50% should be operated or occluded in time. The decrease of arterial blood oxygen content indicates right-to-left shunt, which is commonly seen in tetralogy of Fallot, transposition of great arteries, and Eisenmenger syndrome. Cyanotic congenital heart disease with right-to-left shunt should be evaluated for malformation, and a reasonable surgical plan and scheme should be formulated in time. If Eisenmenger syndrome has occurred, the surgical opportunity will be lost.

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2023

01-12

Methods of intracardiac shunt examination

Methods of intracardiac shunt examination

In some congenital diseases, the gap between the left and right heart cavities is defective, resulting in left and right heart cavity shunts. The unequal blood flow of systemic and pulmonary circulation is called intracardiac shunts. The blood oxygen data obtained by right cardiac catheterization can determine the location, direction and volume of left and right intracardiac shunt. Methods include Fick method, dye dilution method, vitamin C method, inhaled radionuclide krypton method, inhaled nitrogen oxide method, inhaled hydrogen method, etc., of which Fick method is the most reliable. However, selective angiocardiography, CT angiocardiography and color Doppler ultrasound have gradually replaced Fick's method and become more accurate and practical methods for diagnosing intracardiac shunt.

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2023

01-12

Advantages of cardiac interventional surgery

Advantages of cardiac interventional surgery

Cardiac interventional surgery is a new technology for diagnosis and treatment of cardiovascular diseases. After puncturing the blood vessels on the body surface, under the continuous projection of digital subtraction, it is sent into the cardiac catheter. It is a diagnosis and treatment method for diagnosis and treatment of heart disease through specific cardiac catheter operation technology. It is a relatively advanced diagnosis and treatment method for heart disease, and progress is also very rapid. It is between medical treatment and surgical treatment, It is an invasive method of diagnosis and treatment. Including coronary angiography, PTCA+stent, mitral balloon dilation, radiofrequency ablation, pacemaker implantation, interventional treatment of congenital heart disease, intracoronary thrombolysis. Compared with cardiac surgery, cardiac interventional surgery has obvious advantages: 1. The surgical trauma is small, only local anesthesia is needed. 2. The operation time is short. 3. The patient suffered less pain. 4. The operation has high safety, rapid recovery after operation, relatively low cost, immediate effect, and does not affect the opportunity of patients to receive surgical treatment.

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2023

01-12

Simple understanding of cardiac interventional surgery

Simple understanding of cardiac interventional surgery

Cardiac interventional surgery is a new technology for diagnosis and treatment of cardiovascular diseases. After puncturing the blood vessels on the body surface, under the continuous projection of digital subtraction, it is sent into the cardiac catheter. It is a diagnosis and treatment method for diagnosis and treatment of heart disease through specific cardiac catheter operation technology. It is a relatively advanced diagnosis and treatment method for heart disease, and progress is also very rapid. It is between medical treatment and surgical treatment, It is an invasive method of diagnosis and treatment. Including coronary angiography, PTCA+stent, mitral balloon dilation, radiofrequency ablation, pacemaker implantation, interventional treatment of congenital heart disease, intracoronary thrombolysis.

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2023

01-12

Preventive measures for cardiac interventional therapy

Preventive measures for cardiac interventional therapy

Preventive measures: 1. Carry out allergy test in advance, use non-ionic contrast agent, and give dexamethasone 5-10mg IV into a small bottle before operation to high-risk patients.

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2023

01-12

What is cardiac interventional therapy

What is cardiac interventional therapy

Cardiac interventional therapy is a new technology for diagnosis and treatment of cardiovascular diseases. It does not need to open the chest. Under the guidance of imaging methods, through puncturing blood vessels on the body surface, with the help of some instruments, the catheter is sent to the diseased site, and through specific cardiac catheter operation technology, it is a relatively advanced method for diagnosis and treatment of heart disease, and progress is also very rapid. It is between medical treatment and surgical treatment, It is an invasive method of diagnosis and treatment. Including coronary angiography, PTCA+stent, mitral balloon dilation, radiofrequency ablation, pacemaker implantation, interventional treatment of congenital heart disease, intracoronary thrombolysis.

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2023

01-12

Brief introduction of occluder implantation in the treatment of congenital heart disease

Brief introduction of occluder implantation in the treatment of congenital heart disease

At present, there are two traditional methods to treat ventricular septal defect (VSD), atrial septal defect (ASD) and patent ductus arteriosus (PDA) with occluder: surgical operation and medical intervention. Both methods can effectively treat congenital heart disease.

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2023

01-12

What is occluder

What is occluder

Congenital heart disease is a cruel "killer" that endangers children's health and life. According to statistics, about 6 out of every 1000 newborns suffer from congenital heart disease. According to the birth rate and the incidence rate of congenital heart disease, it is estimated that 150000 children are born every year in China. In the incidence of congenital heart disease, ventricular septal defect ("loophole" between the left and right ventricles), atrial septal defect ("loophole" between the left and right ventricles), and patent ductus arteriosus (There is a channel between aorta and pulmonary artery) is one of the most common congenital intracardiac malformations in clinic. As an implant for interventional therapy, occluder has been widely used in the treatment of congenital heart diseases: atrial septal defect, ventricular septal defect and patent ductus arteriosus. The main principle is to block the "leak" between the left and right ventricles, the "leak" between the left and right cardiac chambers, and the channel between the aorta and the pulmonary artery. Congenital heart disease occluder is divided into patent ductus arteriosus occluder, atrial septal defect occluder and ventricular septal defect occluder.

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2023

01-12

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