Impella insertion typically takes 1 to 2 hours from the start of the procedure to confirmation that the device is properly positioned and functioning. But the full timeline you or a loved one will experience, from pre-procedure preparation through removal and recovery, spans much longer. Understanding each phase helps set realistic expectations.
What Happens During Insertion
The Impella is not placed through open-heart surgery. It’s a catheter-based procedure, meaning doctors thread the tiny heart pump through a blood vessel in the groin (or sometimes the arm) and guide it into the heart. This happens in a catheterization lab, not an operating room, and you’re typically under sedation or general anesthesia.
The actual insertion involves gaining access to the artery, threading the catheter up to the heart, positioning the pump across the aortic valve, and confirming placement with imaging. For the smaller models used during high-risk procedures or early heart attack treatment, this process generally falls in the 1 to 2 hour range. The larger model, the Impella 5.5, requires a surgical cutdown to access an artery in the arm or armpit, which adds time and complexity. That procedure can take closer to 2 to 3 hours.
How Long the Device Stays In
The insertion itself is only the beginning. The Impella is designed to stay in your body and support your heart for days or even weeks, depending on why it was placed. The FDA has approved the Impella 5.5 for up to 14 days of support in patients with cardiogenic shock, which is when the heart suddenly can’t pump enough blood. In practice, support duration varies widely. A Mayo Clinic report on patients with advanced heart disease found that the average duration of support with an arm-based pump was 27 days, with some patients supported for as few as 6 days and others for as long as 94 days.
For patients who receive an Impella during a high-risk heart procedure like a complex stent placement, the device may only stay in for a few hours, just long enough to protect the heart during the intervention.
What Recovery Looks Like in the Hospital
While the Impella is in place, you’ll be in an intensive care unit. Movement is restricted because the catheter sits inside a major artery, and shifting it could cause serious complications. You’ll need to lie relatively still, particularly if the device enters through the groin. Medical staff will monitor the pump’s performance continuously on a bedside controller that displays flow rates and positioning.
The weaning process, when your heart has recovered enough to start reducing support, happens gradually. Doctors lower the pump’s output in small increments, watching how your heart responds at each step. There’s no fixed schedule for this. Some patients wean over several hours, others over a day or more, depending on how quickly heart function improves.
Removal and Bed Rest
Removing the Impella is faster than placing it. Once the device is pulled from the artery, the medical team applies firm pressure to the insertion site for about 40 minutes to stop bleeding and allow the vessel to seal. After removal, you’ll need to lie flat and keep the affected leg or arm still for several hours to prevent bleeding from the puncture site.
The total hospital stay after removal depends on the underlying condition. Someone who had the device placed for a short procedure may go home within a day or two of removal. A patient recovering from cardiogenic shock will likely remain hospitalized for additional monitoring and rehabilitation well beyond when the pump comes out.
Factors That Affect the Timeline
Several things can shorten or lengthen each phase of the process:
- The reason for placement. Support during a planned procedure is the shortest scenario, sometimes just a few hours total. Emergency placement for shock involves the longest overall timeline.
- Which Impella model is used. Smaller devices inserted through the groin are quicker to place and remove. The larger 5.5 model, placed through an artery near the armpit, requires a more involved surgical approach.
- How quickly the heart recovers. The device stays in until the heart can maintain adequate blood flow on its own, or until a longer-term solution like a permanent pump or transplant is arranged. This is the single biggest variable in the overall timeline.
- Complications. Bleeding at the insertion site, device migration, or blood cell damage can extend the ICU stay and require additional interventions.
If you’re preparing for a planned procedure with Impella support, expect to spend at least one night in the hospital and plan for the possibility of a longer stay. If a family member has been placed on emergency Impella support, the timeline is far less predictable and will depend on day-by-day assessments of heart function.