Ventricular Volume as Assessed by Cardiac Magnetic Resonance

The Hospital for Sick Children

Status: Completed

Conditions: Arrhythmogenic Right Ventricular Cardiomyophathy (ARVC)

Study type: Observational

Funder types: Other

Identifiers

NCT01678040

1000031585

Details and patient eligibility

About

One of the many uses of cardiac magnetic resonance (CMR) is the assessment of right ventricular (RV) volumes. There are a number of congenital heart defects and acquired conditions in which management decisions are fundamentally based on ventricular volumes. The "gold standard" for assessment of RV volume is CMR. It has better near-field resolution than echo and excellent contrast between the blood pool and the myocardium. CMR is more suitable to the irregular geometry of the RV. The objectives of this study are (1) to assess ventricular volumes in the fasting state and after oral hydration in order to assess the effect of fluid status on ventricular volumes as measured by CMR; (2) to evaluate the effect of hydration on ventricular volumes compared the effect of with inter-observer and intra-observer variability, and; (3) to evaluate the effects of chamber volume on chamber deformation, including strain and peak strain rate. This study hypothesizes that (1) hydration status has an effect on right and left heart volumes, measured by CMR in healthy volunteers; (2) the effect of volume status will be a more significant contributor to variability in RV volumetry than that of inter-observer variability and intra-observer variability, and; (3) atrial and Ventricular deformation corrected for chamber size or volume is more accurate than when uncorrected for volume.

Full description

1. To assess ventricular volumes in the fasting state and after oral hydration in order to assess the effect of fluid status on ventricular volumes as measured by CMR.
2. To evaluate the effect of hydration on ventricular volumes compared the effect of with inter-observer and intra-observer variability.
3. To evaluate the effects of chamber volume on chamber deformation, including strain and peak strain rate.

Enrollment: 15 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Participant must be healthy

Exclusion criteria

• Individuals who are unable to participate in an overnight fast will be excluded
• Those with known or suspected structural heart disease will be excluded
• A screening form to identify pre-existing cardiac conditions will be completed by the subject prior to participation in this study. If a pre-existing condition cardiac condition is identified, or suspected they will be excluded from the study.
• If any functional abnormality is detected at any stage by echocardiography or by CMR the study will be terminated. Common anatomical variants, which are generally regarded as normal variants (such as a patent foramen ovale, or a persistent left superior vena cava) will not lead to exclusion from the study.

Trial design

15 participants in 1 patient group

Cardiac Magnetic Resonance

Description:

The CMR examinations will be performed in the cardiac MRI scanner (Siemens "Avanto", 1.5 Tesla, Erlangen, Germany) at the Hospital for Sick Children. A brief echocardiogram will be performed using a GE Vivid 7 or Vivid E9 machine (General Electric Medical Systems, Wisconsin, USA) We will image from standard parasternal long axis and apical four-chamber before and after completed hydration.