Dominic Stone
Muscle infarction refers to tissue death caused by a lack of oxygen delivery to the muscles. The most common type of muscle infarction is myocardial infarction, colloquially known as a heart attack, which occurs when there is decreased or complete cessation of blood flow to a portion of the myocardium. Limb infarction, which affects the arms or legs, is another type of muscle infarction. Diabetic muscle infarction (DMI) is a rare complication of long-standing diabetes.
| Characteristics | Values |
|---|---|
| Myocardial infarction | Colloquially known as a "heart attack" |
| Caused by decreased or complete cessation of blood flow to a portion of the myocardium | |
| May be "silent" or a catastrophic event leading to sudden death | |
| Caused by underlying coronary artery disease | |
| Prolonged deprivation of oxygen supply to the myocardium can lead to myocardial cell death and necrosis | |
| Patients may experience chest discomfort or pressure that can radiate to the neck, jaw, shoulder, or arm | |
| Limb infarction | Area of tissue death of an arm or leg |
| May cause skeletal muscle infarction, avascular necrosis of bones, or necrosis of a part of or an entire limb | |
| Symptoms include discoloration of the skin following necrosis | |
| Diabetic skeletal muscle infarction presents as painful thigh or leg swelling | |
| Diabetic muscle infarction (DMI) | Very rare complication of long-standing diabetes |
| Presents with pain, swelling, and occasionally, a palpable mass | |
| Treatment | Administer anticoagulant therapy, such as aspirin and low molecular weight heparin |
Explore related products
What You'll Learn
Myocardial infarction (heart attack)
Myocardial infarction, more commonly known as a heart attack, is caused by a decrease or complete cessation of blood flow to a portion of the heart muscle, known as the myocardium. This is often due to underlying coronary artery disease, the leading cause of death in the United States.
When blood flow to the heart is blocked, it can damage or destroy the heart muscle. This prolonged deprivation of oxygen to the myocardium can lead to myocardial cell death and necrosis. Patients may experience chest discomfort or pressure that can radiate to the neck, jaw, shoulder, or arm. Some people may have mild or severe symptoms, while others may have no symptoms at all. Women may experience atypical symptoms such as brief or sharp pain in the neck, arm, or back. In some cases, the first symptom of a heart attack is sudden cardiac arrest.
Heart attacks can be classified based on electrocardiogram (ECG) results. An acute complete blockage of a medium or large heart artery usually indicates an ST-elevation myocardial infarction (STEMI). A partial blockage often means a non-ST elevation myocardial infarction (NSTEMI), although some people with NSTEMI may have a total blockage. Not all heart attacks are caused by blocked arteries; other causes include coronary artery spasms, which are severe squeezings of a blood vessel that is not blocked but may have cholesterol plaques or early hardening due to smoking or other risk factors.
Risk factors for myocardial infarction include smoking, diabetes, hypertension, high blood pressure, and abnormal apolipoprotein ratios. Depression, loss of control, global stress, financial stress, and life events such as marital separation, job loss, and family conflicts are also associated with an increased risk. Maintaining a healthy lifestyle, including a healthy diet, regular exercise, and stress management, can help prevent heart attacks.
How Expiratory Muscles Work: Active During Exhalation
You may want to see also
Explore related products
Atherosclerosis and myocardial infarction
Myocardial infarction (MI), commonly known as a heart attack, is caused by a decrease or complete cessation of blood flow to a part of the myocardium. Atherosclerosis is a type of arteriosclerosis, which refers to the thickening and hardening of arteries. Atherosclerosis is one of the most common and dangerous forms of arteriosclerosis. It can impact any artery in the body and cause many cardiovascular diseases.
During the progression of atherosclerosis, myeloid cells destabilize lipid-rich plaque in the arterial wall and cause it to rupture, triggering myocardial infarction and stroke. After a myocardial infarction, the systemic response to ischemic injury aggravates chronic atherosclerosis. Myocardial infarction may be ""silent"" and go undetected, or it could lead to hemodynamic deterioration and sudden death. Most myocardial infarctions are due to underlying coronary artery disease, which is the leading cause of death in the United States.
Atherosclerosis often starts in childhood and develops over a long period. While the exact cause of the disease is not fully understood, there are several risk factors to be aware of. These include diabetes, genetics, high blood pressure, high cholesterol, obesity, a sedentary lifestyle, smoking, and an unhealthy diet. High blood sugar levels can damage blood vessels and cause plaque accumulation. Family history is also an important consideration when determining an individual's likelihood of developing atherosclerosis.
The treatment for myocardial infarction focuses on minimizing infarct size through the prompt restoration of blood flow. This is achieved through percutaneous coronary intervention, which involves the mechanical expansion of a metal stent into the diseased arterial segment. Smoking cessation is the most cost-effective secondary measure to prevent MI, as smoking has a strong association with atherosclerosis and myocardial infarction. Maintaining a healthy diet, controlling alcohol consumption and weight are also important measures to prevent MI.
Punching and Muscle Growth: Is There a Connection?
You may want to see also
Explore related products
Risk factors for myocardial infarction
Myocardial infarction, or heart attack, occurs when there is a decrease or complete cessation of blood flow to a portion of the myocardium. This can be due to underlying coronary artery disease, the leading cause of death in the United States.
Non-modifiable Risk Factors
Some risk factors for myocardial infarction cannot be changed, including:
- Age: The risk of heart disease increases for men after 45 and for women after 55 (or after menopause).
- Sex: Women are more likely to experience myocardial infarction, especially when other risk factors are present.
- Family history: A family history of early heart disease increases the risk of myocardial infarction.
Modifiable Risk Factors
Many risk factors for myocardial infarction are within an individual's control and can be mitigated through lifestyle changes. These include:
- Smoking: Tobacco smoking, including secondhand smoke, is the most significant modifiable risk factor for myocardial infarction.
- Physical inactivity: Lack of physical activity is linked to 7-12% of myocardial infarction cases. It is recommended that individuals at risk engage in at least 150 minutes of moderate or 75 minutes of vigorous aerobic exercise weekly.
- Diet: A diet high in saturated fat is linked to an increased risk of myocardial infarction. A heart-healthy diet includes whole grains, vegetables, fruits, and fish.
- Obesity: Obesity is a cause of 20% of myocardial infarction cases. Maintaining a healthy weight is important for reducing the risk of myocardial infarction.
- Alcohol consumption: While the protective effect of alcohol was found to be higher in women, excessive alcohol consumption is a risk factor for myocardial infarction.
- Hypertension: High blood pressure increases the risk of myocardial infarction, especially in women.
- Diabetes: Diabetes, particularly when poorly controlled, increases the risk of myocardial infarction.
- High cholesterol: Elevated cholesterol levels, particularly LDL cholesterol, are a risk factor for myocardial infarction.
- Stress: Psychosocial factors such as depression, stress, and life events like job loss or family conflicts can increase the risk of myocardial infarction.
- Air pollution: Short-term exposure to air pollutants like carbon monoxide, nitrogen dioxide, and sulfur dioxide is associated with an increased risk of myocardial infarction.
- Infections: Certain acute and chronic infections, such as Chlamydophila pneumoniae, influenza, Helicobacter pylori, and Porphyromonas gingivalis, have been linked to an increased risk of myocardial infarction.
It is important to note that these risk factors can often be mitigated through lifestyle changes and proper medical treatment. Myocardial infarction is a serious condition, with a mortality rate of 5-30%, but proactive measures can significantly reduce the risk and improve outcomes.
Running and Muscle Loss: What's the Real Deal?
You may want to see also
Explore related products
Diabetic muscle infarction
Muscle infarction is tissue death in the arm or leg, which may cause skeletal muscle infarction. Diabetic muscle infarction (DMI) is a rare complication associated with poorly controlled diabetes mellitus. DMI is characterised by acute pain and swelling of the affected muscle, most often in the lower extremities. The pain is usually in the thigh or leg, and irreversible damage starts to occur after 4–6 hours of blood supply cessation.
DMI is a rare microangiopathic complication associated with poorly controlled diabetes mellitus. It was first described by Angervall and Stener in 1965 and usually presents in patients with a long history of diabetes and associated complications of poor glycaemic control, including nephropathy, retinopathy, and/or neuropathy. Since then, fewer than 200 cases have been reported in the literature.
There is no standard of care or structured guidelines for managing these patients. Non-steroidal anti-inflammatory drug therapy is associated with the shortest recovery time and lowest risk of recurrence. However, in cases of end-stage renal disease, these drugs may be contraindicated. Magnetic resonance imaging (MRI) is the preferred test for diagnosing skeletal muscle infarction.
To prevent enlargement of a thrombus, low molecular weight heparin is used, and is also indicated before any surgery. In the legs, percutaneous aspiration thrombectomy is a rapid and effective way of removing thromboembolic occlusions.
Running: Targeted Muscle Groups and Their Benefits
You may want to see also
Explore related products
Limb infarction
Early symptoms of limb infarction include discoloration (mottling, cyanosis, or darkening) of the skin following necrosis, with a distinct demarcation at the blockage. Diabetic skeletal muscle infarction may also present as painful thigh or leg swelling. The nerves and muscles are the major tissues affected, with irreversible damage starting to occur after 4–6 hours of blood supply cessation.
Magnetic resonance imaging (MRI) is the preferred test for diagnosing skeletal muscle infarction. Resting the affected limb can delay the onset of infarction after arterial occlusion. Low molecular weight heparin is used to reduce or prevent enlargement of a thrombus, and is also indicated before surgery. In the legs, percutaneous aspiration thrombectomy can be used to remove thromboembolic occlusions.
Due to the high recurrence rates of thromboembolism, anticoagulant therapy is often necessary. Aspirin and low molecular weight heparin are commonly administered, and warfarin may also be used. With treatment, approximately 80% of patients are alive (95% after surgery), and about 70% of infarcted limbs remain vital after 6 months.
MDA Muscle Walk: What, Why, and How?
You may want to see also
Frequently asked questions
Muscle infarction is tissue death caused by a lack of blood flow and oxygen delivery to the muscle.
DMI is a rare complication of long-standing diabetes. It is caused by vascular disease such as arteriosclerosis and diabetic microangiopathy. It presents with pain, swelling, and occasionally a palpable mass.
DMI is diagnosed through a combination of clinical presentation and radiological imaging, with MRI being the most valuable diagnostic technique.
Myocardial infarction, also known as a heart attack, is tissue death of the heart muscle caused by a lack of blood flow and oxygen delivery. It is usually caused by a blockage in the arteries supplying blood to the heart.
Symptoms of myocardial infarction include chest discomfort or pressure that can radiate to the neck, jaw, shoulder, or arm. It can be a silent condition or lead to sudden death.
