Five-year survival after percutaneous coronary intervention at two centers in Addis Ababa, Ethiopia: a retrospective chart review with time-to-event analysis
This retrospective study of 108 patients in Addis Ababa, Ethiopia, found a five-year all-cause survival rate of 83.5% following percutaneous coronary intervention, with failure to achieve post-procedural TIMI grade III flow identified as a significant predictor of mortality despite the small sample size limiting adjusted analyses.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Heart disease is a leading cause of death worldwide, and in many places, the treatment of choice for a blocked artery is a procedure called percutaneous coronary intervention. In this common medical practice, a doctor threads a tiny tube through a blood vessel to reach a narrowed or blocked artery in the heart. They then inflate a small balloon to widen the passage and often leave behind a tiny mesh tube, known as a stent, to keep the artery open. While this procedure is routine in wealthy nations, it is a relatively new arrival in many parts of Africa. For over a decade, doctors in Ethiopia have been performing these interventions, but the medical world has lacked a clear picture of what happens to patients after they leave the hospital. Most existing reports focus only on whether the procedure worked immediately or if the patient survived the few days in the hospital. No one knew if these patients were living long, healthy lives years later, or if the challenges of life in a developing nation—such as the high cost of medication or the difficulty of traveling for follow-up visits—were shortening their lives.
To fill this gap, a team of researchers in Addis Ababa, the capital of Ethiopia, decided to look back at the records of patients who had undergone this heart procedure at two local hospitals. They wanted to see how many of these patients were still alive five years after their treatment. The team gathered information from the medical charts of 108 adults who had received the procedure between 2019 and 2023. These patients were, on average, 54 years old, and most were men. The researchers tracked down each patient to see if they were still alive, using hospital records and making phone calls to families. They did not just count who was alive; they also looked at the details of the procedure to see if specific factors, such as how well blood flowed through the heart artery after the operation, made a difference in long-term survival.
The results showed that the majority of these patients survived for five years. Specifically, about 83 out of every 100 patients were still alive five years after the procedure. This is a hopeful finding, suggesting that the treatment works well even in a setting with limited resources. However, the study also revealed a critical warning sign. The researchers found that patients who did not achieve a strong, clear flow of blood through their heart artery immediately after the procedure had a much harder time surviving. Among the small group of patients who had poor blood flow after the surgery, less than half were still alive at the five-year mark. In contrast, those who had excellent blood flow after the procedure had a survival rate of nearly 88 percent. This difference was so significant that it stood out clearly against other factors the team examined, such as whether the patient had diabetes, high blood pressure, or was a smoker.
The study also looked at the type of treatment used. Most patients received a drug-coated stent, while a very small number were treated with just a balloon and no stent. The patients who received only the balloon had a lower survival rate, but the researchers were careful not to blame the balloon itself. They noted that the doctors likely chose not to use a stent for specific reasons, such as the size of the artery or the cost of the device, and these underlying reasons might be what put those patients at higher risk. Similarly, while women in the study had lower survival rates than men, the number of women was too small to say for certain why this happened. The researchers emphasized that because the group of patients was relatively small and the number of deaths was low, they could not prove that one specific factor caused the deaths. Instead, their work serves as a strong suggestion that the quality of blood flow immediately after the surgery is a vital indicator of long-term health.
This research provides the first long-term look at heart procedure outcomes in Ethiopia, moving beyond the immediate aftermath of the surgery to see the real-world results over several years. The findings suggest that while the procedure is effective, the success of the treatment depends heavily on how well the artery is opened during the operation. The study does not offer a complete solution or a guaranteed path forward, but it highlights a specific area where medical teams can focus their efforts. By ensuring that blood flow is restored as completely as possible during the procedure, doctors may be able to improve the chances of patients living longer, fuller lives. The authors conclude that larger studies are needed to confirm these patterns, but for now, this work offers a clear and encouraging glimpse into the future of heart care in Ethiopia.
Drowning in papers in your field?
Get daily digests of the most novel papers matching your research keywords — with technical summaries, in your language.