Identification of stimulation site of pacemaker lead using tissue tracking method

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Imaging

Background:

• Permanent pacemaker implantation is a common procedure for heart rhythm disorders.
• Accurate placement of pacemaker leads is crucial for effective cardiac pacing.
• Identifying the precise electrical stimulation site is essential for optimizing pacemaker function.

Purpose of the Study:

• To determine the electrical stimulation sites of pacemaker leads.
• To utilize tissue tracking method of tissue Doppler imaging for this identification.
• To enhance the understanding of myocardial activation patterns post-pacemaker implantation.

Main Methods:

• A study group of 30 patients with permanent pacemaker implantation was analyzed.
• Tissue Doppler imaging was employed to visualize myocardial contraction.
• The initial contraction site, appearing as a red area, was precisely analyzed using time-distance curves generated by tissue tracking.

Main Results:

• The initial myocardial contraction site was identified in the interventricular septum (7 patients) and the apical portion of the right ventricle (11 patients).
• Time-distance curve analysis revealed a specific point within the stimulated area that exhibited earlier movement.
• This indicates a localized origin of electrical activation.

Conclusions:

• The time-distance curves generated by the tissue tracking method can accurately determine the electrical stimulation site within the myocardium.
• This technique offers a precise, non-invasive method for assessing pacemaker lead electrical stimulation.
• Findings can guide adjustments in pacemaker lead placement for improved patient outcomes.