Tiny control zones in the heart's natural pacemaker and how they change with pressure
Functional Microdomains in the Heart's Pacemaker: A New Dimension of Cardiac Remodeling
This work looks at how small regions inside the heart's natural pacemaker respond to long-term pressure so it can help people who develop sick sinus syndrome and slow or irregular heartbeats.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of Wisconsin-Madison NIH-funded |
| Lab location | 1 site (Madison, United States) |
| Project ID | NIH-11248012 on NIH RePORTER |
What this research studies
Scientists will examine the sinoatrial node (the heart's natural pacemaker) using advanced imaging to see how its tiny structural zones change when the heart is under chronic mechanical load. They will image cell structure, track calcium and cAMP chemical signals, record electrical activity, and run biochemical tests to link those changes to pacemaker dysfunction. Much of the work will model conditions like high blood pressure that stretch the heart and can lead to sick sinus syndrome. The goal is to map the steps from mechanical stress to altered signaling and rhythm problems so new prevention or treatment ideas can emerge.
Who could benefit from this research
Good fit: People with long-standing high blood pressure or symptoms of sick sinus syndrome (such as unexplained slow heart rate, fainting, dizziness, or long pauses in heartbeat) would be most relevant to this work.
Not a fit: Patients whose rhythm problems are caused by unrelated issues like isolated valve disease or non-cardiac causes may not directly benefit from these findings.
Why it matters
Potential benefit: If successful, this could point to ways to prevent or treat sick sinus syndrome and reduce episodes of dangerously slow or irregular heartbeats.
How similar studies have performed: Previous animal and cell studies show mechanical stretch affects pacemaker cells, but applying high-resolution imaging of microdomains in the sinoatrial node to explain remodeling and sick sinus syndrome is a newer approach.
Where this research is happening
Madison, United States
- University of Wisconsin-Madison — Madison, United States (Active)
Researchers
- Principal investigator: Glukhov, Alexey V — University of Wisconsin-Madison
- Study coordinator: Glukhov, Alexey V
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.