Early High BP Linked to Increased CVD & Kidney Disease Risk

Elevated blood pressure experienced during the years between ages 30 and 40 may significantly increase the risk of cardiovascular disease (CVD) and chronic kidney disease (CKD) later in life, according to research presented at the American Heart Association’s EPI | Lifestyle Scientific Sessions. The study, which analyzed data from nearly 300,000 Korean adults, suggests that even seemingly moderate increases in blood pressure during these formative years can have lasting consequences for heart and kidney health. This finding underscores the importance of early blood pressure monitoring and intervention, even in young adults who might otherwise be considered at low short-term risk.

Researchers found that for every 10 mm Hg increase in systolic blood pressure (the top number in a reading) above 120 mm Hg between ages 30 and 40, the risk of CVD events—including heart attack, stroke, heart failure, and cardiovascular death—rose by 27%. Similarly, the risk of kidney events, such as chronic kidney disease or kidney failure, increased by 22%. Elevated diastolic blood pressure (the bottom number) also showed a significant association with increased risk, with a 20% increase in CVD risk for every 5 mm Hg rise above 80 mm Hg, and a 16% increase in kidney event risk.

Cumulative Exposure Matters

The study’s strength lies in its focus on cumulative exposure to elevated blood pressure. Rather than a single measurement, researchers examined blood pressure readings taken repeatedly over a decade, providing a more comprehensive picture of an individual’s exposure. The median number of examination visits between ages 30 and 40 years was eight, with a median follow-up of over 10 years after age 40. This approach highlights that the duration of exposure to even slightly elevated blood pressure can contribute to long-term damage.

“Young adults often have a particularly low predicted 10-year risk of heart disease, even when they have elevated or high blood pressure,” explained Hokyou Lee, MD, PhD, FAHA, associate professor of preventive medicine at Yonsei University College of Medicine in Seoul, South Korea, in a press release. “Our study’s findings demonstrate that blood pressure levels in early adulthood are important even if short-term risk appears low. Long-term exposure to higher blood pressure from early life may accumulate damage over time, increasing the risk of heart and kidney disease in midlife.”

Study Details and Limitations

The research team analyzed data from 291,887 participants in the Korean National Health Insurance Service database, all aged 40 or older and without a prior history of CVD or CKD. Participants had blood pressure measurements taken at age 30, age 40, and at least once in between. The primary outcomes assessed were composite measures of CVD events (myocardial infarction, ischemic stroke, heart failure, or cardiovascular death) and kidney events (chronic kidney disease, kidney replacement therapy, or kidney-related death).

It’s important to note that this study was observational, meaning it can demonstrate an association between blood pressure and disease risk, but cannot prove causation. Other factors, such as genetics, lifestyle, and underlying health conditions, could also play a role. The study population was limited to Korean adults, so the findings may not be generalizable to other ethnic groups. The researchers did, however, report that the association between CVD and CKD risk and cumulative exposure to elevated BP from age 30 to 40 years was similar for both men and women, and remained significant even after adjusting for a single blood pressure reading at age 40.

What Does This Mean for Individuals?

The findings reinforce the importance of proactive blood pressure management throughout life, starting in young adulthood. While many people associate high blood pressure with older age, this research suggests that even moderate elevations in early adulthood can have long-term consequences. Lifestyle modifications, such as adopting a healthy diet, engaging in regular physical activity, and maintaining a healthy weight, can help to lower blood pressure. For individuals with persistently elevated blood pressure, medication may be necessary, as determined by a qualified healthcare professional.

Understanding Blood Pressure Numbers

Blood pressure is measured in millimeters of mercury (mm Hg) and is expressed as two numbers: systolic (the pressure when the heart beats) and diastolic (the pressure when the heart rests between beats). Normal blood pressure is generally considered to be less than 120/80 mm Hg. Elevated blood pressure is defined as a systolic reading of 120-129 mm Hg and a diastolic reading of less than 80 mm Hg. High blood pressure, or hypertension, is defined as a systolic reading of 130 mm Hg or higher, or a diastolic reading of 80 mm Hg or higher.

The Role of Early Detection and Intervention

Daniel W. Jones, MD, MACP, FAHA, dean and professor emeritus of the University of Mississippi School of Medicine, emphasized the significance of early intervention. “This study from Korea emphasizes the risk from high blood pressure begins at an early age and early in the course,” he said in the release. “The opportunity in this study to evaluate cumulative blood pressure over several years was important in understanding that risk. The study should encourage the design of randomized clinical trials to document that early treatment of high blood pressure in young adults is effective at reducing risk for cardiovascular and kidney disease.”

What’s Next?

The findings from this study add to a growing body of evidence highlighting the importance of lifelong blood pressure management. Further research, including randomized controlled trials, is needed to confirm these findings and to determine the optimal strategies for preventing and treating high blood pressure in young adults. Public health initiatives aimed at raising awareness about the risks of elevated blood pressure and promoting early detection and intervention are also crucial. Healthcare providers should routinely screen young adults for high blood pressure and provide appropriate counseling and treatment as needed.