Cardiac stents are generally safe, but potential side effects include chest pain, blood clots, restenosis, arrhythmias, bleeding, and rare procedural complications.

Common Side Effects

Chest pain is frequently reported after stent placement, affecting up to 41% of patients within the first 72 hours. This may result from arterial stretching, spasms, or, in rare cases, a heart attack, and should always be reported to a healthcare provider immediately . Palpitations, or irregular heartbeats, are also common, occurring in about 83% of patients shortly after the procedure, often due to improved blood flow or temporary heart rhythm disturbances .

Serious Complications

Restenosis refers to the gradual re-narrowing of the artery at the stent site due to abnormal tissue growth. This can lead to recurrent chest pain and may require repeat angioplasty or placement of a drug-eluting stent . Stent thrombosis, the formation of a blood clot inside the stent, is a serious complication that can cause heart attack, stroke, or embolism to other parts of the body . Bleeding can occur at the catheter insertion site or from arterial tears, typically within the first 12–15 hours post-procedure . Rarely, the procedure may cause damage to nearby blood vessels or the heart itself . Allergic reactions to contrast dye used during the procedure can also occur, and in rare cases, may lead to kidney damage .

Other Risks

Patients may experience arrhythmias, infections, or discomfort related to catheter insertion . Individuals with pre-existing conditions such as diabetes, kidney disease, or prior heart surgeries may have a higher risk of complications . Long-term management often includes antiplatelet therapy to reduce the risk of clot formation and regular follow-up to monitor stent function .

Summary

While cardiac stents are life-saving and generally safe, patients should be aware of potential side effects ranging from temporary chest pain and palpitations to serious complications like restenosis, stent thrombosis, and bleeding. Prompt reporting of symptoms and adherence to prescribed medications and lifestyle recommendations are essential for optimal recovery and long-term heart health .