Patients with hypertrophic cardiomyopathy (HCM) and HCM gene carriers have attenuated myocardial oxygenation response to vasodilator stress - a potential mechanism for sudden cardiac death

نویسندگان

  • Sairia Dass
  • Theodoros Karamitsos
  • Joseph Suttie
  • Emily Sever
  • Michael Jerosch-Herold
  • Hugh Watkins
  • Stefan Neubauer
چکیده

Background By exploiting the paramagnetic properties of deoxyhemoglobin, blood oxygen level-dependent (BOLD) MRI can detect myocardial ischemia in patients with coronary artery disease. However, little is known about myocardial tissue oxygenation in pathological left ventricular hypertrophy (e.g. HCM) or physiological hypertrophy (e. g. elite athletes). Perfusion studies have shown that patients with HCM show evidence of microvascular dysfunction, however, whether this leads to de-oxygenation and ischemia is unclear.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Apical Hypertrophic Cardiomyopathy in a Case with Chest Pain and Family History of Sudden Cardiac Death: A Case Report

Hypertrophic cardiomyopathy (HCM) is the most common genetic cardiovascular disease, which is caused by a multitude of mutations in genes encoding proteins of the cardiac sarcomere (1). Apical hypertrophic cardiomyopathy (AHCM) is an uncommon type of HCM. The sudden cardiac death is less likely to occur in the patients inflicted with AHCM (2). Herein, we presented the case of a 29-year-old man ...

متن کامل

Preclinical alterations in cardiac energetics amongst sarcomere mutation carriers in hypertrophic cardiomyopathy

Background Hypertrophic cardiomyopathy (HCM) is characterised by reduced myocardial tissue oxygenation (assessed using blood oxygen level dependent (BOLD) CMR imaging) during stress, as well as reduced myocardial perfusion reserve (MPRI) due to coronary microvascular dysfunction. In HCM gene carriers without the HCM phenotype, it has been suggested that only oxygenation is impaired. [1] It rema...

متن کامل

Coronary microvascular function, myocardial metabolism, and energetics in hypertrophic cardiomyopathy: insights from positron emission tomography.

Hypertrophic cardiomyopathy (HCM) is a major cause of sudden cardiac death in adolescence, and may lead to heart failure at any age. However, significant heterogeneity in the clinical course and phenotypic expression exists. Next to left ventricular hypertrophy, an impaired myocardial blood flow (MBF) during stress and inefficient cardiac metabolism are other characteristics of HCM. Studies usi...

متن کامل

Investigation of Polymorphisms in Non-Coding Region of Human Mitochondrial DNA in 31 Iranian Hypertrophic Cardiomyopathy (HCM) Patients

The D-loop region is a hot spot for mitochondrial DNA (mtDNA) alterations, containing two hypervariable segments, HVS-I and HVS-II. In order to identify polymorphic sites and potential genetic background accounting for Hypertrophic CardioMyopathy (HCM) disease, the complete non-coding region of mtDNA from 31 unrelated HCM patients and 45 normal controls were sequenced. The sequences were aligne...

متن کامل

[Myocardial fibrosis in patients with hypertrophic cardiomyopathy and high risk for sudden death].

BACKGROUND The stratification of risk for sudden death in hypertrophic cardiomyopathy (HCM) continues to be a true challenge due to the great heterogeneity of this disease's presentation, as most individuals remain asymptomatic during their entire lives and others present sudden death as first symptom. Recent studies have suggested that myocardial fibrosis may represent an important substrate f...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره 14  شماره 

صفحات  -

تاریخ انتشار 2012