Electrocardiographic Pad for Efficient Cardiac MR Gating.

Area of Science:

• Cardiovascular Imaging
• Medical Devices
• Biomedical Engineering

Background:

• Electrocardiographic (ECG) gating is crucial for cardiac magnetic resonance (MR) imaging.
• Traditional ECG lead placement can be time-consuming and uncomfortable for patients.
• There is a need for simplified, reliable ECG gating methods in cardiac MR.

Purpose of the Study:

• To evaluate the feasibility and reliability of a novel, skin-contact-free ECG-gated cardiac MR imaging system.
• To assess a simplified, reusable electrode design for ECG gating.
• To compare the performance of the new ECG system with standard ECG leads.

Main Methods:

• A reusable silicon positioner held ECG leads, detecting signals through the patient's gown and electrode gel.
• The system was tested at 1.5 T on 12 volunteers and 52 patients using various cardiac MR sequences.
• Setup time, image quality, ECG signal quality, ventricular septal sharpness, and signal-to-noise ratio were assessed and compared to standard leads.

Main Results:

• The novel ECG pad system significantly reduced setup time by 148 seconds (P = .005).
• Image quality (3.9 vs 3.8) and ECG signal quality (4.9 vs 4.9) were comparable between the ECG pad and standard leads.
• The system was successful in 96% of patients, with volunteers reporting increased comfort and convenience.

Conclusions:

• The simplified, skin-contact-free ECG gating approach is feasible and reliable for cardiac MR imaging.
• This method offers significant advantages in reduced setup time and improved patient comfort.
• The novel ECG system represents a convenient and efficient alternative for ECG-gated cardiac MR procedures.