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Int J Cardiol. 2017 Oct 15;245:201-206. doi: 10.1016/j.ijcard.2017.06.031.

Malignant cardiac phenotypic expression of Danon disease (LAMP2 cardiomyopathy).

Author information

1
Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, University of Wisconsin School of Medicine and Public Health, 2801 W. Kinnickinnic River Parkway, Milwaukee, WI 53215, USA.
2
Department of Internal Medicine, Aurora St. Luke's Medical Center, Milwaukee, WI.
3
Center for Integrative Research on Cardiovascular Aging (CIRCA), Aurora Research Institute, 2801 W. Kinnickinnic River Parkway, Milwaukee, WI 53215, USA.
4
Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, University of Wisconsin School of Medicine and Public Health, 2801 W. Kinnickinnic River Parkway, Milwaukee, WI 53215, USA. Electronic address: publishing14@aurora.org.

Abstract

INTRODUCTION:

Danon disease is an X-linked lysosomal condition that causes a deficiency of lysosome-associated membrane protein 2 (LAMP2) gene. It is characterized clinically by a triad of skeletal myopathy, cardiomyopathy, and intellectual disability.

METHODS:

We examined clinical, echocardiographic, and genetic data on 5 patients with Danon disease, highlighting their clinical course and outcomes.

RESULTS:

All patients presented phenotypically with hypertrophic cardiomyopathy and later developed systolic dysfunction. The mean age at diagnosis was 19years (11-31years). All patients had diastolic dysfunction (mean e' of 5cm/s [3.5-6cm/s], mean E/e' of 17 [15-21]). Three patients required cardiac transplantation (ages 15, 27, and 42). Of the two deaths in this group, both were in women.

CONCLUSION:

We highlight the aggressive cardiac phenotype of Danon disease in our clinical experience with rapid progression to end-stage cardiomyopathy; this progression occurred in both men and women. A timely diagnosis and an early referral for cardiac transplantation is crucial for improved outcomes.

KEYWORDS:

Danon disease; Echocardiography; Hypertrophic cardiomyopathy

Comment in

PMID:
28874292
DOI:
10.1016/j.ijcard.2017.06.031
[Indexed for MEDLINE]

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