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Familial Hypertrophic Cardiomyopathy: Late Potentials and Other Prognostic Markers

Ândrea Chaves-Markman1, Manuel Markman2, Marcelo Antônio O Santos-Veloso3

  • 1Cardiology, Rarus - A Rare Disease Service, Recife, BES.

Cureus
|February 12, 2020
PubMed

Insights

This study found no link between late potentials and a family history of sudden death, syncope, or arrhythmias in hypertrophic cardiomyopathy patients. These findings are crucial for understanding hypertrophic cardiomyopathy risks.

Area of Science:

  • Cardiology
  • Genetics
  • Sudden Cardiac Death

Background:

  • Familial hypertrophic cardiomyopathy (HCM) is a genetic disorder and a leading cause of sudden cardiac death (SCD) in young adults, particularly athletes.
  • HCM diagnosis relies on echocardiogram criteria, but risk stratification for adverse events remains critical.

Purpose of the Study:

  • To investigate the association between late potentials and a family history of SCD, syncope, and complex ventricular arrhythmias in patients with HCM.
  • To identify potential predictors of adverse cardiac events in HCM patients.

Main Methods:

  • A case series study involving 22 patients diagnosed with HCM via transthoracic echocardiogram.
  • Exclusion criteria included pacemaker use, right bundle branch block, cardiac transplant, and inability to undergo examinations.
  • Data collected included type of hypertrophy, family history, and presence of late potentials and arrhythmias.

Main Results:

  • Asymmetric septal hypertrophy was the most common type (73%) in the study cohort.
  • A significant proportion of patients had a positive family history: 63% for HCM, 55% for SCD, and 23% for syncope.
  • Late potentials were detected in 23% of patients, and complex ventricular arrhythmias in 14%.

Conclusions:

  • The presence of late potentials was not statistically associated with a family history of SCD, syncope, or complex ventricular arrhythmias in this cohort of HCM patients.
  • Further research is needed to elucidate the prognostic value of late potentials in HCM and their relationship with genetic predisposition and clinical events.

Keywords:
cardiogenic syncopefamilial hypertrophic cardiomyopathylate potentialsprognostic markersudden death

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