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Dilated cardiomyopathy is a common form of cardiomyopathy that can lead to valvular dysfunction, cardiac arrhythmias, and intracardiac thrombus formation. Early intervention with appropriate treatment strategies, along with proactive preventive measures, can help improve prognosis and prolong patient survival.

What is dilated cardiomyopathy?

The heart consists of upper chambers (atria) and lower chambers (ventricles). The left ventricle has a thick muscular wall and plays a key role in pumping oxygenated blood to the rest of the body.

Dilated cardiomyopathy is a condition in which the main pumping chamber of the heart, particularly the left ventricle, becomes enlarged and its walls become thinned. As a result, the myocardium is unable to contract effectively, leading to impaired cardiac output, fluid retention, and pulmonary congestion.

Dilated cardiomyopathy is more commonly observed in men than in women and typically affects individuals between 20 and 60 years of age.

What causes dilated cardiomyopathy?

The exact etiology of dilated cardiomyopathy remains unclear. However, several factors have been identified as potential contributors to the development of this condition.

Main causes of dilated cardiomyopathy

• Coronary artery disease (arterial narrowing or obstruction)
• Hypertension
• Genetic predisposition

Additional factors that may increase the risk of dilated cardiomyopathy

• Infections, such as HIV and Lyme disease
• Complications of late pregnancy associated with dilated cardiomyopathy
• Diabetes mellitus
• Iron overload affecting the heart and other organs (hemochromatosis)
• Cardiac arrhythmias

• Obesity
• Valvular heart disease, such as mitral regurgitation or aortic regurgitation
• Myocardial injury
• Family history of dilated cardiomyopathy, heart failure, or sudden cardiac arrest
• Myocarditis associated with immune system disorders
• Neuromuscular disorders
• Substance abuse, including alcohol or cocaine

Other causes

• Exposure to toxins such as lead, mercury, or cobalt
• Adverse effects of certain chemotherapeutic agents

How is dilated cardiomyopathy diagnosed?

To establish an accurate diagnosis of dilated cardiomyopathy, physicians begin with a comprehensive review of the patient’s medical history and family history. This is followed by a series of diagnostic tests, including:

• Echocardiography: This is the primary diagnostic modality for dilated cardiomyopathy. Ultrasound waves generate real-time images of the heart, allowing assessment of cardiac structure, ventricular dilation, blood flow, and valvular function. It typically demonstrates left ventricular enlargement and impaired systolic function.
• Chest radiography: Chest X-ray provides visualization of cardiac size and may detect pulmonary congestion or fluid accumulation in or around the lungs.
• Blood tests: Laboratory investigations help identify underlying conditions such as infections, diabetes mellitus, or iron overload disorders that may contribute to dilated cardiomyopathy.
• Holter monitoring: This device continuously records cardiac activity during daily activities, helping detect arrhythmias.
• Electrocardiography (ECG/EKG): ECG records the electrical activity of the heart and can identify tachyarrhythmias, bradyarrhythmias, or signs of reduced cardiac output.
• Cardiac CT or MRI: These imaging modalities provide detailed information on cardiac chamber size, structure, and function. Cardiac CT uses X-ray technology, while cardiac MRI utilizes magnetic fields and radiofrequency waves.
• Cardiac catheterization: This procedure allows visualization of the coronary arteries under X-ray to assess for ischemic damage and evaluate myocardial function.
• Exercise stress testing: Exercise testing using a treadmill or stationary bicycle, combined with cardiac monitoring, evaluates the heart’s response to physical exertion.
• Genetic screening and counseling: Given the hereditary component of dilated cardiomyopathy, genetic testing and counseling may be recommended for the patient and first-degree relatives, including parents, siblings, and children.

Is dilated cardiomyopathy dangerous?

The severity of dilated cardiomyopathy depends on the extent of clinical manifestations and disease progression. In conjunction with clinical evaluation and diagnostic testing, the presence of the following symptoms can assist physicians in establishing an accurate diagnosis:

• Fatigue
• Orthopnea (shortness of breath when lying flat)
• Paroxysmal nocturnal dyspnea disrupting sleep
• Peripheral edema involving the legs, ankles, and feet
• Chest pain
• Palpitations or tachycardia
• Fluid retention leading to unexplained weight gain

In the early stages, dilated cardiomyopathy may be asymptomatic. As a result, symptoms are often mistaken for other conditions, leading to delayed diagnosis when the disease has already progressed to a more advanced stage.

Complications of dilated cardiomyopathy

• Heart failure: The heart is unable to pump sufficient blood to meet the body’s metabolic demands. If left untreated, heart failure can be life-threatening.
• Valvular regurgitation: Dilated cardiomyopathy may impair proper valve closure, resulting in backward leakage of blood through the affected valves.
• Cardiac arrhythmias: Structural and functional changes in the heart can disrupt normal electrical conduction, leading to irregular heart rhythms.
• Sudden cardiac arrest: Dilated cardiomyopathy, particularly when associated with other risk factors, may precipitate sudden cessation of cardiac activity.

• Thromboembolism: Blood stasis within the left ventricle increases the risk of thrombus formation. When these clots enter the systemic circulation, they can obstruct blood flow to vital organs, including the heart and brain, potentially leading to stroke, myocardial infarction, and other organ damage.

In summary, dilated cardiomyopathy is a serious condition that can lead to severe complications, including heart failure and even death. Early recognition of symptoms and identification of underlying causes are essential for timely intervention.

For appointment scheduling and consultation, please contact the hotline: 0911 858 626.

Can dilated cardiomyopathy be treated?

Yes. The management of dilated cardiomyopathy focuses on controlling symptoms through pharmacological therapy and, when indicated, interventional or surgical approaches to help patients restore functional capacity and improve quality of life. Treatment strategies typically include:

Pharmacological treatment

Common medications used in the management of dilated cardiomyopathy include:

• Diuretics, which promote fluid excretion and reduce volume overload associated with impaired cardiac function
• Beta-blockers, which decrease cardiac workload and improve overall cardiac efficiency
• Angiotensin-converting enzyme inhibitors (ACE inhibitors), which optimize cardiac output, provide cardioprotection, and slow disease progression
• Anticoagulants (blood thinners), which help prevent thrombus formation
• Antiarrhythmic agents, which reduce the risk of abnormal heart rhythms
• Aldosterone antagonists, which block the effects of aldosterone, a hormone that contributes to vascular constriction and fluid retention
• Neprilysin inhibitors, which have similar effects to ACE inhibitors and ARBs by promoting natriuresis, lowering blood pressure, and improving clinical symptoms
• Sodium–glucose cotransporter-2 (SGLT2) inhibitors, which reduce cardiovascular mortality in patients with dilated cardiomyopathy, particularly those with coexisting diabetes mellitus

Surgical and interventional treatment

Dilated cardiomyopathy is often associated with cardiac arrhythmias, where the heart may beat too fast, too slow, or irregularly. In such cases, implantable devices may be placed subcutaneously in the chest to regulate cardiac rhythm and function.

Implantable devices

Pacemakers, which monitor and regulate heart rhythm by delivering electrical impulses

Implantable cardioverter-defibrillators (ICDs), which detect abnormal rhythms and deliver electrical shocks to restore normal cardiac rhythm

Left ventricular assist devices (LVADs), which help pump blood from the left ventricle to the rest of the body

Surgical interventions

In patients with left ventricular dilation associated with coronary artery disease or valvular pathology, surgical management may be indicated.

Coronary artery bypass grafting (CABG) or percutaneous coronary intervention to relieve arterial obstruction and improve myocardial perfusion

Surgical repair or replacement of dysfunctional heart valves

Heart transplantation

Heart transplantation, using a donor heart, may be considered in patients with advanced, refractory dilated cardiomyopathy.

Care for dilated cardiomyopathy

Lifestyle modification is an effective strategy to control disease progression and support recovery following treatment or surgical intervention

Adopting a healthy lifestyle

• Avoid excessive alcohol consumption and limit stimulants
• Practice safe sexual behaviors to reduce the risk of viral hepatitis and HIV infection

Heart-healthy nutrition

• Increase intake of lean protein sources such as chicken breast, lean meat, and fish
• Ensure adequate consumption of vitamins and minerals from vegetables and fruits
• Follow a diet low in sodium, sugar, and saturated fats to prevent fluid retention and reduce cardiac workload

Regular physical activity

Engage in light to moderate exercise combined with cardiac rehabilitation programs to improve cardiovascular function

Regular health monitoring

• Maintain control of blood pressure and heart rate to detect abnormalities early
• Undergo periodic cardiovascular evaluations to monitor disease progression

The Cardiology Department at Hong Ngoc General Hospital is currently a leading center in the application of advanced techniques and modern treatment modalities for patients with dilated cardiomyopathy.

Cardiology Department – Hong Ngoc General Hospital: A trusted destination for comprehensive cardiovascular care

- 55 Yen Ninh Street, Ba Dinh District, Hanoi

- No. 8 Chau Van Liem Street, Tu Liem District, Hanoi

- Hotline for consultation and appointment scheduling: 0911 858 626

Note: The information provided in this article by Hong Ngoc General Hospital is for reference purposes only and does not replace professional medical diagnosis or treatment. For an accurate assessment of your condition, patients should visit a reputable healthcare facility for direct consultation and individualized treatment planning by qualified physicians.

Follow the official fanpage of Hong Ngoc General Hospital for more useful health information.

Dilated cardiomyopathy is a common form of cardiomyopathy that can lead to valvular dysfunction, cardiac arrhythmias, and intracardiac thrombus formation. Early intervention with appropriate treatment strategies, along with proactive preventive measures, can help improve prognosis and prolong patient survival.

What is dilated cardiomyopathy?

The heart consists of upper chambers (atria) and lower chambers (ventricles). The left ventricle has a thick muscular wall and plays a key role in pumping oxygenated blood to the rest of the body.

Dilated cardiomyopathy is a condition in which the main pumping chamber of the heart, particularly the left ventricle, becomes enlarged and its walls become thinned. As a result, the myocardium is unable to contract effectively, leading to impaired cardiac output, fluid retention, and pulmonary congestion.

Dilated cardiomyopathy is more commonly observed in men than in women and typically affects individuals between 20 and 60 years of age.

What causes dilated cardiomyopathy?

The exact etiology of dilated cardiomyopathy remains unclear. However, several factors have been identified as potential contributors to the development of this condition.

Main causes of dilated cardiomyopathy

• Coronary artery disease (arterial narrowing or obstruction)
• Hypertension
• Genetic predisposition

Additional factors that may increase the risk of dilated cardiomyopathy

• Infections, such as HIV and Lyme disease
• Complications of late pregnancy associated with dilated cardiomyopathy
• Diabetes mellitus
• Iron overload affecting the heart and other organs (hemochromatosis)
• Cardiac arrhythmias

• Obesity
• Valvular heart disease, such as mitral regurgitation or aortic regurgitation
• Myocardial injury
• Family history of dilated cardiomyopathy, heart failure, or sudden cardiac arrest
• Myocarditis associated with immune system disorders
• Neuromuscular disorders
• Substance abuse, including alcohol or cocaine

Other causes

• Exposure to toxins such as lead, mercury, or cobalt
• Adverse effects of certain chemotherapeutic agents

How is dilated cardiomyopathy diagnosed?

To establish an accurate diagnosis of dilated cardiomyopathy, physicians begin with a comprehensive review of the patient’s medical history and family history. This is followed by a series of diagnostic tests, including:

• Echocardiography: This is the primary diagnostic modality for dilated cardiomyopathy. Ultrasound waves generate real-time images of the heart, allowing assessment of cardiac structure, ventricular dilation, blood flow, and valvular function. It typically demonstrates left ventricular enlargement and impaired systolic function.
• Chest radiography: Chest X-ray provides visualization of cardiac size and may detect pulmonary congestion or fluid accumulation in or around the lungs.
• Blood tests: Laboratory investigations help identify underlying conditions such as infections, diabetes mellitus, or iron overload disorders that may contribute to dilated cardiomyopathy.
• Holter monitoring: This device continuously records cardiac activity during daily activities, helping detect arrhythmias.
• Electrocardiography (ECG/EKG): ECG records the electrical activity of the heart and can identify tachyarrhythmias, bradyarrhythmias, or signs of reduced cardiac output.
• Cardiac CT or MRI: These imaging modalities provide detailed information on cardiac chamber size, structure, and function. Cardiac CT uses X-ray technology, while cardiac MRI utilizes magnetic fields and radiofrequency waves.
• Cardiac catheterization: This procedure allows visualization of the coronary arteries under X-ray to assess for ischemic damage and evaluate myocardial function.
• Exercise stress testing: Exercise testing using a treadmill or stationary bicycle, combined with cardiac monitoring, evaluates the heart’s response to physical exertion.
• Genetic screening and counseling: Given the hereditary component of dilated cardiomyopathy, genetic testing and counseling may be recommended for the patient and first-degree relatives, including parents, siblings, and children.

Is dilated cardiomyopathy dangerous?

The severity of dilated cardiomyopathy depends on the extent of clinical manifestations and disease progression. In conjunction with clinical evaluation and diagnostic testing, the presence of the following symptoms can assist physicians in establishing an accurate diagnosis:

• Fatigue
• Orthopnea (shortness of breath when lying flat)
• Paroxysmal nocturnal dyspnea disrupting sleep
• Peripheral edema involving the legs, ankles, and feet
• Chest pain
• Palpitations or tachycardia
• Fluid retention leading to unexplained weight gain

In the early stages, dilated cardiomyopathy may be asymptomatic. As a result, symptoms are often mistaken for other conditions, leading to delayed diagnosis when the disease has already progressed to a more advanced stage.

Complications of dilated cardiomyopathy

• Heart failure: The heart is unable to pump sufficient blood to meet the body’s metabolic demands. If left untreated, heart failure can be life-threatening.
• Valvular regurgitation: Dilated cardiomyopathy may impair proper valve closure, resulting in backward leakage of blood through the affected valves.
• Cardiac arrhythmias: Structural and functional changes in the heart can disrupt normal electrical conduction, leading to irregular heart rhythms.
• Sudden cardiac arrest: Dilated cardiomyopathy, particularly when associated with other risk factors, may precipitate sudden cessation of cardiac activity.

• Thromboembolism: Blood stasis within the left ventricle increases the risk of thrombus formation. When these clots enter the systemic circulation, they can obstruct blood flow to vital organs, including the heart and brain, potentially leading to stroke, myocardial infarction, and other organ damage.

In summary, dilated cardiomyopathy is a serious condition that can lead to severe complications, including heart failure and even death. Early recognition of symptoms and identification of underlying causes are essential for timely intervention.

For appointment scheduling and consultation, please contact the hotline: 0911 858 626.

Can dilated cardiomyopathy be treated?

Yes. The management of dilated cardiomyopathy focuses on controlling symptoms through pharmacological therapy and, when indicated, interventional or surgical approaches to help patients restore functional capacity and improve quality of life. Treatment strategies typically include:

Pharmacological treatment

Common medications used in the management of dilated cardiomyopathy include:

• Diuretics, which promote fluid excretion and reduce volume overload associated with impaired cardiac function
• Beta-blockers, which decrease cardiac workload and improve overall cardiac efficiency
• Angiotensin-converting enzyme inhibitors (ACE inhibitors), which optimize cardiac output, provide cardioprotection, and slow disease progression
• Anticoagulants (blood thinners), which help prevent thrombus formation
• Antiarrhythmic agents, which reduce the risk of abnormal heart rhythms
• Aldosterone antagonists, which block the effects of aldosterone, a hormone that contributes to vascular constriction and fluid retention
• Neprilysin inhibitors, which have similar effects to ACE inhibitors and ARBs by promoting natriuresis, lowering blood pressure, and improving clinical symptoms
• Sodium–glucose cotransporter-2 (SGLT2) inhibitors, which reduce cardiovascular mortality in patients with dilated cardiomyopathy, particularly those with coexisting diabetes mellitus

Surgical and interventional treatment

Dilated cardiomyopathy is often associated with cardiac arrhythmias, where the heart may beat too fast, too slow, or irregularly. In such cases, implantable devices may be placed subcutaneously in the chest to regulate cardiac rhythm and function.

Implantable devices

Pacemakers, which monitor and regulate heart rhythm by delivering electrical impulses

Implantable cardioverter-defibrillators (ICDs), which detect abnormal rhythms and deliver electrical shocks to restore normal cardiac rhythm

Left ventricular assist devices (LVADs), which help pump blood from the left ventricle to the rest of the body

Surgical interventions

In patients with left ventricular dilation associated with coronary artery disease or valvular pathology, surgical management may be indicated.

Coronary artery bypass grafting (CABG) or percutaneous coronary intervention to relieve arterial obstruction and improve myocardial perfusion

Surgical repair or replacement of dysfunctional heart valves

Heart transplantation

Heart transplantation, using a donor heart, may be considered in patients with advanced, refractory dilated cardiomyopathy.

Care for dilated cardiomyopathy

Lifestyle modification is an effective strategy to control disease progression and support recovery following treatment or surgical intervention

Adopting a healthy lifestyle

• Avoid excessive alcohol consumption and limit stimulants
• Practice safe sexual behaviors to reduce the risk of viral hepatitis and HIV infection

Heart-healthy nutrition

• Increase intake of lean protein sources such as chicken breast, lean meat, and fish
• Ensure adequate consumption of vitamins and minerals from vegetables and fruits
• Follow a diet low in sodium, sugar, and saturated fats to prevent fluid retention and reduce cardiac workload

Regular physical activity

Engage in light to moderate exercise combined with cardiac rehabilitation programs to improve cardiovascular function

Regular health monitoring

• Maintain control of blood pressure and heart rate to detect abnormalities early
• Undergo periodic cardiovascular evaluations to monitor disease progression

The Cardiology Department at Hong Ngoc General Hospital is currently a leading center in the application of advanced techniques and modern treatment modalities for patients with dilated cardiomyopathy.

Cardiology Department – Hong Ngoc General Hospital: A trusted destination for comprehensive cardiovascular care

- 55 Yen Ninh Street, Ba Dinh District, Hanoi

- No. 8 Chau Van Liem Street, Tu Liem District, Hanoi

- Hotline for consultation and appointment scheduling: 0911 858 626

Note: The information provided in this article by Hong Ngoc General Hospital is for reference purposes only and does not replace professional medical diagnosis or treatment. For an accurate assessment of your condition, patients should visit a reputable healthcare facility for direct consultation and individualized treatment planning by qualified physicians.

Follow the official fanpage of Hong Ngoc General Hospital for more useful health information.