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Hypertrophic Cardiomyopathy -- Child

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by Kohnle D

(Cardiomyopathy, Hypertrophic—Child; HCM—Child; Idiopathic Hypertrophic Subaortic Stenosis—Child; Asymmetric Septal Hypertrophy—Child; ASH—Child; HOCM—Child; Hypertrophic Obstructive Cardiomyopathy—Child)

 

Definition

Hypertrophic cardiomyopathy (HCM) is a form of cardiomyopathy . This is a condition in which the heart muscle thickens due to genetic problems with the muscle’s structure. As the muscle thickens, it must work harder to pump blood. This strains the heart muscle. Sometimes, the thickened muscle gets in the way of the blood leaving the heart and causes a blockage. This blockage can cause a nearby valve to become leaky. HCM can cause uneven muscle growth. This can cause the heart to pump in a disorganized way. Rarely, it can cause abnormal heart rhythms that can be fatal.
Normal Heart and Heart With Hypertrophic Cardiomyopathy
Hypertrophic Cardiomyopathy
Copyright © Nucleus Medical Media, Inc.
 

Symptoms

Symptoms may include:
  • Chest pain
  • Fainting, particularly during exercise
  • Lightheadedness, particularly following exercise
  • Heart palpitations
  • Shortness of breath or difficulty breathing
  • General fatigue
  • Tiring easily during exercise or activity
These symptoms can be caused by some of the side effects of the condition, including abnormal heart beats . The blocked or reduced blood flow is usually the cause of symptoms like lightheadedness, fainting, and difficulty breathing. Babies with the condition may have the following symptoms:
  •  Fast, heavy breathing when feeding
  • Sweating when feeding
  • Tiredness or inactivity
  • Poor weight gain
Some children may not have any symptoms. The condition may be suspected if there is a murmur , although not every person with HCM has a murmur and not all murmurs are due to HCM.
 

RESOURCES

American Heart Association
http://www.heart.org

Cardiomyopathy Association
http://www.cardiomyopathy.org

 

CANADIAN RESOURCES

Canadian Cardiovascular Society
http://www.ccs.ca

Heart and Stroke Foundation of Canada
http://ww2.heartandstroke.ca

 

References


Cardiomyopathy in children. Cincinnati Children’s Hospital website. Available at: http://www.cincinnatichildrens.org/health/heart-encyclopedia/disease/cardiomyopathy.htm. Updated March 2013. Accessed December 3, 2013.


Erwin JP, Nishimura RA, et al. Dual chamber pacing for patients with hypertrophic obstructive cardiomyopathy: a clinical perspective in 2000. Mayo Clin Proc. 2000;75:173-180.


The HCM Program. St. Luke's Roosevelt Hospital Center website. Available at: http://www.hcmny.org/whatis/index.html. Accessed December 3, 2013.


Hypertrophic cardiomyopathy. The Cleveland Clinic website. Available at: http://my.clevelandclinic.org/heart/disorders/hcm/default.aspx. Accessed December 3, 2013.


Hypertrophic cardiomyopathy. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated October 3, 2013. Accessed December 3, 2013.


Maron BJ, Nishimura RA, McKenna WJ, et al. Assessment of permanent dual chamber pacing for patients with hypertrophic cardiomyopathy. Circulation. 1999;99:2927-2933.


McCully RB, Nishimura RA, Tajik AJ, Schaff HV, Danielson GK. Extent of clinical improvement after surgical treatment of hypertrophic obstructive cardiomyopathy. Circulation. 1996;94:467-471.


Pediatric cardiomyopathies. The American Heart Association website. Available at: http://www.heart.org/HEARTORG/Conditions/More/CardiovascularConditionsofChildhood/Pediatric-Cardiomyopathies%5FUCM%5F312219%5FArticle.jsp. Updated September 20, 2012. Accessed December 3, 2013.

 

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