What the HeartString Device Taught Me About Possibility in the OR

One of the most fascinating things about being in the OR — especially in cardiac surgery — is realizing just how many tools, techniques, and technologies exist that you never learn about in the classroom.

Take the HeartString device, for example. 🫀

It’s used in coronary artery bypass graft procedures (CABG), and most students will go through their entire program without ever seeing one.

In a CABG, a vein is removed endoscopically from the patient’s leg and used as an autologous graft to bypass plaque-clogged coronary arteries. The graft is attached in two places: a distal anastomosis to a coronary artery beyond the blockage, and a proximal anastomosis to the aorta.

Just like in vascular surgery, the surgeon uses a blade to create the initial arteriotomy and Potts scissors to elongate it. That’s standard for the distal connection. But for the proximal, you’ve got options — and one of them is the HeartString.

The device comes in two parts:

• The Punch 🥊 – A single-use tool that creates a perfectly-sized aortic hole. Once it’s deployed, you can’t reuse it.

• The HeartString itself – A small device inserted into the opening. Once in place, it deploys and creates a sort of upside-down umbrella ☂ effect, blocking excess blood from entering the field so the surgeon can perform the anastomosis with a clear view.

It’s clean. It’s controlled. And for a moment, it turns a high-pressure part of the procedure into something surgically elegant.

Here’s the thing: students don’t often get to see tools like this. You don’t know they exist unless you’re in the room when they’re used — and that’s what makes real OR exposure so essential. Because beyond your textbooks and checklists, there’s a whole world of supplies, strategies, and specialties waiting for you. The more you learn about them now, the more confident and capable you’ll be when it’s your turn to assist.