Fleetwood Mac’s hit song, “Don’t stop thinking about tomorrow,” got a second life as the anthem for then-candidate Bill Clinton’s first campaign for President. A new report in JAMA Neurology may trigger the return of that earworm. The report offers yet another reminder that tomorrow may not be better if you have uncontrolled high blood pressure.
Researchers with the long-term Atherosclerosis Risk in Communities (ARIC) Neurocognitive Study followed the health and mental function of nearly 13,500 men and women for more than 20 years. All of the participants were between the ages of 45 and 64 years when the study began; 76% were white and 24% were African-American. Between 1990 and 1992, the participants took three tests that measured memory and thinking skills. They took the same tests six years later, and again between 2011 and 2013. Their blood pressure was also measured, and researchers noted which participants were taking medicine to control high blood pressure (also known as hypertension).
There was a general decline over 20 years in memory and thinking skills (collectively called cognitive function). But high blood pressure in middle age was clearly linked with an increased risk of loss of memory and thinking skills:
- The decline among participants with high blood pressure was 6.5% greater than in those with normal blood pressure.
- The decline among those with high blood pressure was more pronounced in whites than in African-Americans. However, because African-Americans had a higher death rate before the last set of tests, the researchers believe that their proportionately small number remaining may have skewed the results.
- Among participants with high blood pressure in middle age, those who were taking medication to control it lost less cognitive ground over time than those with untreated high blood pressure.
- Those who had normal blood pressure in midlife and who developed high blood pressure in their late 60s, 70s, and 80s had similar test scores as those who had normal blood pressure throughout.
“This provides more evidence that hypertension contributes to lost memory and reasoning ability over the long term, ” says Melinda C. Power, ScD, an author of the study who just moved from the Harvard School of Public Health to Johns Hopkins University School of Medicine. The findings dovetail with an analysis that Power and her colleagues at the Harvard School of Public Health published last winter in the journal Epidemiology. It showed that the longer a person lives with high blood pressure, the more likely he or she is to develop memory loss and to have difficulty thinking.
High blood pressure and memory
An important strength of this study is its duration. It is the first study to track blood pressure and brain function over 20 years. But keep in mind that the ARIC study is an observational investigation. It can’t prove that high blood pressure causes declines in memory and thinking skills, and it definitely doesn’t prove that treating high blood pressure in middle age protects memory and thinking skills. Even so, Power says, observational studies can do things that clinical trials can’t, like track more people over a longer time.
The ARIC report serves as a reminder to keep an eye on your blood pressure. A healthy blood pressure is under 120/80. Although the guidelines from various expert groups aren’t in complete accord on when to begin treating high blood pressure, how to do it, and what target to aim for, most agree that otherwise healthy people under age 60 with high blood pressure should aim for a goal of under 140/90. That said, individual recommendations should be based on age, medication use, and general state of health. The appropriate goal for you, and the way to reach it, is best decided in a discussion with your doctor.
Preventing blood pressure from creeping into the unhealthy range is even better than treating high blood pressure. These lifestyle strategies are excellent ways to do this:
- Keep your weight in the healthy range
- Eat a heart-healthy diet with plenty of fruits and vegetables
- Watch your salt intake, most of which comes from processed foods
- Exercise daily, or at least five times a week
- Limit the alcohol—no more than one drink a day for women, no more than two a day for men
- Don’t smoke or use other tobacco products
The main take-home lesson from this study and others like it, says Power, is this: The longer you live with normal blood pressure, the less likely you are to have memory and reasoning problems when you’re older.
Related Information: Hypertension: Controlling the silent killer
Bible verses for today’s meditation and inspiration: Matthew E. McLaren
Your beauty should not come from outward adornment, such as elaborate hairstyles and the wearing of gold jewelry or fine clothes. Rather, it should be that of your inner self, the unfading beauty of a gentle and quiet spirit, which is of great worth in God’s sight. 1 Peter 3:3-4 NIV
Above all else, guard your heart, for everything you do flows from it. Proverbs 4:23 NIV
As water reflects the face, so one’s life reflects the heart. Proverbs 27:19 NIV
May he give you the desire of your heart and make all your plans succeed. Psalm 20:4 NIV
The heart is deceitful above all things and beyond cure. Who can understand it? “I the Lord search the heart and examine the mind, to reward each person according to their conduct, according to what their deeds deserve.” Jeremiah 17:9-10 NIV
You will seek me and find me when you seek me with all your heart. Jeremiah 29:13 NIV
Let love and faithfulness never leave you; bind them around your neck, write them on the tablet of your heart. Then you will win favor and a good name in the sight of God and man. Proverbs 3:3-4 NIV
Trust in the Lord with all your heart and lean not on your own understanding; in all your ways submit to him, and he will make your paths straight. Proverbs 3:5-6 | NIV
Create in me a pure heart, O God, and renew a steadfast spirit within me. Psalm 51:10 NIV
But the Lord said to Samuel, “Do not consider his appearance or his height, for I have rejected him. The Lord does not look at the things people look at. People look at the outward appearance, but the Lord looks at the heart.” 1 Samuel 16:7 NIV
Jesus replied: ‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ Matthew 22:37 NIV
Take delight in the Lord, and he will give you the desires of your heart. Psalm 37:4 NIV
Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver. 2 Corinthians 9:7 NIV
A cheerful heart is good medicine, but a crushed spirit dries up the bones. Proverbs 17:22 NIV
My son, do not forget my teaching, but keep my commands in your heart, for they will prolong your life many years and bring you peace and prosperity. Proverbs 3:1-2 NIV
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