Cardiomyopathy definition

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Cardiomyopathy Definition and Key Characteristics

Cardiomyopathy refers to a group of diseases where the heart muscle (myocardium) becomes structurally and functionally abnormal, leading to impaired mechanical or electrical function of the heart. This condition is not primarily caused by other heart diseases such as coronary artery disease, hypertension, valvular disease, or congenital heart disease, and often results in heart failure, arrhythmias, or other complications Ugli2025Wexler2009Bembey2024+2 MORE.

Types and Classification of Cardiomyopathy

Cardiomyopathies are classified into several main types based on their structural and functional characteristics:

Dilated Cardiomyopathy (DCM): Characterized by dilation and impaired contraction of the left or both ventricles, not explained by abnormal loading conditions or coronary artery disease Bembey2024Ciarambino2021Schultheiss2019+1 MORE.
Hypertrophic Cardiomyopathy (HCM): Involves thickening of the heart muscle, often genetic, and is a leading cause of sudden cardiac death in young athletes Bembey2024Ciarambino2021McKenna2017.
Restrictive Cardiomyopathy (RCM): Marked by increased stiffness of the heart muscle, leading to restricted filling of the ventricles, while the size of the ventricles remains normal Bembey2024Ciarambino2021Rapezzi2022.
Arrhythmogenic Cardiomyopathy (ARVC): Characterized by replacement of heart muscle with fibrofatty tissue, leading to arrhythmias Ugli2025Ciarambino2021McKenna2017.
Other Forms: These include takotsubo (stress-induced) cardiomyopathy and channelopathies, which are disorders of the heart’s electrical channels Ciarambino2021McKenna2017Maron2006.

Causes and Etiology of Cardiomyopathy

Cardiomyopathies can be:

Primary: Due to genetic, mixed, or acquired factors directly affecting the heart muscle Wexler2009Bembey2024McKenna2017+1 MORE.
Secondary: Resulting from systemic diseases, toxins, infections, autoimmune or metabolic disorders Ugli2025Wexler2009Bembey2024+2 MORE.

Clinical Presentation and Symptoms

Symptoms of cardiomyopathy often overlap with those of heart failure and may include:

Shortness of breath
Fatigue
Palpitations
Edema (swelling)
Chest pain
Syncope (fainting) Ugli2025Wexler2009Bembey2024+1 MORE

Diagnosis and Management

Diagnosis typically involves a combination of:

Medical history and physical examination
Blood tests and genetic testing
Electrocardiography (ECG)
Echocardiography and other imaging techniques Wexler2009Bembey2024Rapezzi2022+1 MORE

Treatment focuses on:

Managing heart failure symptoms with medications (ACE inhibitors, beta-blockers, diuretics)
Device therapy (implantable cardioverter-defibrillators, cardiac resynchronization therapy)
Heart transplantation in severe cases
Lifestyle modifications (diet, exercise, avoiding alcohol and smoking) Ugli2025Wexler2009Bembey2024+2 MORE

Conclusion

Cardiomyopathy is a diverse group of heart muscle diseases that can lead to significant health problems, including heart failure and sudden cardiac death. Early diagnosis and tailored treatment are crucial for improving outcomes and quality of life for affected individuals Ugli2025Wexler2009Bembey2024+2 MORE.

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Most relevant research papers on this topic

Cardiomyopathy

Cardiomyopathy is a group of diseases affecting the heart muscle, causing impaired functions and leading to heart failure, arrhythmias, and thromboembolic complications.

Literature Review

2025·

0citations

·Samandar Kochiboyev Ismatulla ugli

Texas Journal of Medical Science·

DOI

Cardiomyopathy: An Overview

Cardiomyopathies can lead to progressive heart failure, and treatment options include medications, implantable cardioverter-defibrillators, cardiac resynchronization therapy, and lifestyle changes.

Literature ReviewHighly Cited

2009·

272citations

·R. Wexler et al.

American family physician

Cardiomyopathy in a nutshell: from etiopathogenesis and diagnosis to treatment

Cardiomyopathy is a group of myocardial disorders with different phenotypes, and early diagnosis and treatment can reduce morbidity and mortality.

2024·

0citations

·R. Bembey et al.

International Journal of Research in Medical Sciences·

DOI

Cardiomyopathies: An Overview

Hypertrophic cardiomyopathy (HCM) is the most common cardiomyopathy, with HCM being the most important cause of sudden death on the athletic field in the United States.

Systematic ReviewHighly Cited

2021·

143citations

·T. Ciarambino et al.

International Journal of Molecular Sciences·

DOI

Clinical Aspects of Cardiomyopathy

Cardiomyopathy is a subacute or chronic disorder of heart muscle of unknown or obscure aetiology, often with associated endocardial and pericardial involvement, but not atherosclerotic in origin.

Literature ReviewHighly Cited

1961·

260citations

·J. Goodwin et al.

British Medical Journal·

DOI

Classification, Epidemiology, and Global Burden of Cardiomyopathies.

Cardiomyopathies are easily diagnosed but currently treated with palliative pharmacological or invasive therapies, with potential for curative therapies targeting molecular mechanisms.

Literature ReviewRigorous JournalHighly Cited

2017·

388citations

·W. McKenna et al.

Circulation research·

DOI

Restrictive cardiomyopathy: definition and diagnosis

Restrictive cardiomyopathy (RCM) is a diverse group of diseases characterized by restrictive left ventricular pathophysiology, with four main disease mechanisms and diverse therapies.

Literature ReviewRigorous JournalHighly Cited

2022·

130citations

·C. Rapezzi et al.

European Heart Journal·

DOI

Dilated cardiomyopathy

Dilated cardiomyopathy (DCM) is a complex, heterogeneous condition caused by genetic and nongenetic factors, with standard heart failure treatments being the first-line treatment.

Literature ReviewHighly Cited

2019·

443citations

·H. Schultheiss et al.

Nature Reviews. Disease Primers·

DOI

Dilated cardiomyopathy: causes, mechanisms, and current and future treatment approaches.

Dilated cardiomyopathy is caused by both genetic and acquired factors, and future treatments should consider both genetic and acquired factors for optimal outcomes.

Highly Cited

2023·

165citations

·Stephane R B Heymans et al.

Lancet·

DOI

Contemporary definitions and classification of the cardiomyopathies: an American Heart Association Scientific Statement from the Council on Clinical Cardiology, Heart Failure and Transplantation Committee; Quality of Care and Outcomes Research and Functional Genomics and Translational Biology Interd

This new classification of cardiomyopathies provides clarity and reflects the rapid evolution of molecular genetics in cardiology, incorporating ion channelopathies as a primary cardiomyopathy.

Highly Cited

2006·

3045citations

·B. Maron et al.

Circulation·

DOI

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