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Hypertrophic Cardiomyopathy

Reviewed 06/2019
 


BASICS

DESCRIPTION

  • Hypertrophic cardiomyopathy (HCM) is a form of primary myocardial hypertrophy, with or without presence of left ventricular outflow tract (LVOT) obstruction; it is characterized by f...

DIAGNOSIS

HISTORY

  • Symptoms of heart failure: dyspnea, paroxysmal nocturnal dyspnea, fatigue

  • Angina pectoris

  • Palpitations

  • Exertional syncope or presyncope

  • Symptoms may be worsened by anemia, hot and humid w...

TREATMENT

  • These patients must be counseled against competitive athletics, irrespective of LVOT obstruction, presence of ICD, previous septal reduction therapy, and associated symptoms (3),(4).

  • Adequate...

ONGOING CARE

FOLLOW-UP RECOMMENDATIONS

  • Annual follow-up is recommended for stable patients.

  • Among the first-degree relatives, screening with ECG and echo is recommended every 12 to 18 months between age...

REFERENCES

1
Liew AC, Vassiliou VS, Cooper R, et al. Hypertrophic cardiomyopathy—past, present and future. J Clin Med.  2017;6(12). [View Abstract on OvidMedline]
2
Maron BJ. Contemporary insights a...

ADDITIONAL READING

  • Brothers MB, Oster ME, Ehrlich A, et al. Novel electrocardiographic screening criterion for hypertrophic cardiomyopathy in children. Am J Cardiol.  2014;113(7):1246–1249. [View...

CODES

ICD10

  • I42.2 Other hypertrophic cardiomyopathy

  • I42.1 Obstructive hypertrophic cardiomyopathy

ICD9

  • 425.18 Other hypertrophic cardiomyopathy

  • 425.11 Hypertrophic obstructive cardiomyopathy

SNOMED

  • 233873004...

CLINICAL PEARLS

  • HCM should be considered in all patients with a history of unexplained SCD. It is the most common cause of SCD in young athletes in the United States.

  • Delayed de novo onset of LVH may o...

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