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Double cardiomyopathy: coexistent cardiac amyloidosis and hypertrophic obstructive cardiomyopathy
W P Buchanan1, S W Schreiter, F R Kahl
1Department of Medicine, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 27157.
Insights
The rare coexistence of hypertrophic obstructive cardiomyopathy (HOCM) and cardiac amyloidosis presents diagnostic challenges. This combination complicates treatment and underscores the need for advanced diagnostic methods in complex cardiac cases.
Area of Science:
- Cardiology
- Pathology
Background:
- Hypertrophic obstructive cardiomyopathy (HOCM) and cardiac amyloidosis are distinct cardiac conditions.
- The simultaneous occurrence of both HOCM and cardiac amyloidosis in a single patient is exceptionally rare.
Observation:
- A patient presented with clinical and echocardiographic features suggestive of HOCM.
- Diagnosis of cardiac amyloidosis was delayed, identified only post-myocardial biopsy which initially failed to confirm HOCM.
- The patient ultimately succumbed to intractable heart failure.
Findings:
- Autopsy confirmed the co-existence of HOCM and cardiac amyloidosis.
- The combination of these two cardiomyopathies poses significant diagnostic and therapeutic difficulties.
Implications:
- This case highlights the diagnostic complexities arising from rare co-existing cardiac pathologies.
- Effective management strategies for patients with combined HOCM and cardiac amyloidosis require further investigation.
Abstract:
A combination of hypertrophic obstructive cardiomyopathy (HOCM) and cardiac amyloidosis in the same patient is very rare. Clinical diagnosis could be extremely difficult and may require myocardial biopsy. We are reporting a patient with this combination who was referred to our institution because of features of HOCM based on clinical, echocardiographic and Doppler criteria. Cardiac amyloidosis was only recognized after myocardial biopsy that failed to reveal evidence of HOCM. Only after the patient expired from severe, intractable heart failure did the autopsy findings confirm the association of HOCM. We believe that the combination of the two cardiomyopathic processes is very rare and makes treatment extremely difficult.