Understanding the Prevalence of Cardiovascular Risk Factors: A Clarion Call for Awareness

Recent research reveals an alarming truth about heart attacks, heart failure, and strokes: they rarely strike without warning signs. Although the first occurrence of these events often leaves patients, clinicians, and researchers perplexed, a comprehensive prospective cohort study suggests that the reality is quite different.

More than 99% of individuals who suffered from heart-related conditions possessed at least one of four major cardiovascular risk factors. These included suboptimal blood pressure, cholesterol levels, or blood glucose, as well as current or past smoking habits. Notably, over 93% of the more than 9.3 million participants across two national cohorts, tracked for two decades, had multiple risk factors.

Among women aged under 60—a group typically deemed at lower risk—over 95% experienced at least one nonoptimal risk factor prior to facing heart failure or stroke. This pervasive presence of warning signs far exceeds what has previously been reported in other studies, emphasizing the urgent need for awareness and proactive care.

As Neha Pagidipati from the Duke Clinical Research Institute noted in a companion editorial, “Every practicing cardiologist has seen cases in which individuals without any known risk factors sustain a myocardial infarction (MI) or develop significant coronary disease.” However, the study’s findings suggest that the occurrence of cardiovascular disease (CVD) without obvious risk factors may be significantly less frequent than previously indicated.

One key reason for this discrepancy lies in the definitions applied by various medical organizations. Philip Greenland, a preventive cardiologist at Northwestern University Feinberg School of Medicine and lead author of the study published in the Journal of the American College of Cardiology, highlights the contrast between what constitutes “optimal” health according to the American Heart Association and the criteria used for clinical treatment.

For instance, the recommended optimal blood pressure is set at 120/80 mmHg or lower, while the threshold for clinical intervention is typically 130/80 mmHg. Similarly, the optimal total cholesterol level is 200 mg/dL, whereas the clinical action level is 240 mg/dL. Such discrepancies indicate that many patients may slip through the cracks; although they do not meet clinical thresholds, their risk factors remain problematic.

Greenland pointed out that this approach can lead to overlooking individuals who have nonoptimal but not yet clinically elevated risk levels. “Heart attack, stroke, and heart failure are actually not occurring out of the blue,” he stated. “Individuals often possess risk factors that are significantly above optimal levels, and it is common to find two or more contributing factors.”

He emphasized that even modest elevations in factors such as blood pressure, cholesterol, blood sugar, and smoking can significantly increase cardiovascular risk. “This message is crucial for both medical professionals and patients,” he stressed. “Recognizing and addressing nonoptimal levels can lead to effective prevention strategies against serious outcomes like heart attacks and strokes.”

In the context of the JACC study, a staggering 90% to 95% of participants had at least one clinically elevated risk factor, predominantly linked to blood pressure. The World Health Organization categorizes clinical hypertension in adults as having blood pressure readings at or above 140/90 mmHg. However, it also acknowledges that blood pressure readings between 120 mmHg and 130 mmHg, while not classified as hypertension, still pose increased health risks.

Moreover, the methodology for assessing these risk factors plays a vital role in accurately determining overall heart health. Research based on comprehensive datasets, such as those compiled through national health systems in South Korea, offers a clearer image compared to studies relying solely on medical records, which might miss those at risk.

This situation raises important questions for both patients and healthcare providers. Karen Joynt-Maddox, a general cardiologist at Washington University in St. Louis, pointed out a significant issue within the U.S. healthcare system: a tendency to prioritize treatment over prevention. She argues, “We have much that we could be doing. It’s just that the system is not structured to facilitate this.”

Ultimately, awareness regarding risk factors such as high blood pressure is critical. In Joynt-Maddox’s view, many individuals are unaware of their elevated risks until faced with serious complications. “No one wants to have a heart attack or a stroke,” she noted. “However, high blood pressure often remains invisible until it manifests in severe ways.”

This article highlights the pressing need for increased awareness and proactive measures in combating cardiovascular disease, emphasizing the vital role that understanding risk factors plays in prevention.

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