Many people know that high cholesterol is bad for the heart, but not everyone understands how much it should be lowered. For people who already have heart disease, this question is especially important.
A new study now shows that lowering cholesterol more than usual can make a big difference in preventing serious health problems.
Heart disease often begins when cholesterol builds up inside the arteries. Over time, this buildup forms plaques that make the arteries narrow and stiff. If a plaque breaks open, it can block blood flow completely and cause a heart attack or stroke.
The main type of cholesterol involved in this process is LDL cholesterol. Doctors often call it “bad cholesterol” because high levels increase the risk of heart problems. Treatments usually focus on lowering LDL-C using medications and lifestyle changes.
In recent years, experts have suggested lowering LDL-C to very low levels for people with heart disease. However, there has not been enough strong evidence to confirm whether this approach is truly better.
To answer this question, researchers carried out a large study involving more than 3,000 patients with existing heart disease. These patients were treated in hospitals across South Korea and were carefully monitored for several years.
The participants were split into two groups with different treatment goals. One group aimed to lower their LDL-C to below 55 mg/dL, while the other group aimed for below 70 mg/dL. Both targets are considered low, but the first is more aggressive.
Doctors used standard treatments to help patients reach their goals. These included statins and other cholesterol-lowering medicines. Treatment decisions were made based on real-world practice, which makes the findings more relevant to everyday care.
After three years, the results showed that patients with the lower cholesterol target had better outcomes. Fewer people in this group experienced major heart problems such as heart attacks, strokes, or the need for procedures to treat blocked arteries.
Overall, the risk of these events was reduced by about 33% compared to the group with the higher target. This is a meaningful difference that could save many lives if applied widely.
Another important finding was that lowering cholesterol more aggressively did not increase safety risks. Patients did not have more side effects, and there were no major concerns about muscle problems or diabetes. This suggests that aiming for lower cholesterol levels is both effective and safe.
The study also showed that the benefits were consistent across different patient groups. This means that most people with heart disease could potentially benefit from lowering their LDL-C to below 55 mg/dL.
However, the researchers also noted some challenges. Not all patients were able to reach the lower target, partly because some advanced medications were not widely available. In addition, the study was conducted in one country, which means more research is needed to confirm the findings in other populations.
Even with these limitations, the study provides strong support for more intensive cholesterol treatment in high-risk patients. It shows that going beyond traditional targets can lead to better protection against serious heart problems.
In simple terms, the message is clear. For people who already have heart disease, lowering bad cholesterol as much as possible can significantly reduce the risk of future events.
The findings were presented at the American College of Cardiology’s Annual Scientific Session.
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Source: Yonsei University College of Medicine.
