One of my fellow boxers at the Rock Steady Boxing affiliate in Hilton Head/Bluffton, SC has been having issues of dizziness and brain fog/light headedness. He’s not alone, as 1 in 5 people with Parkinson’s are also diagnosed with Orthostatic Hypotension. I’ve been collecting some information to help him prepare for his next doctor’s appointment, and thought this may be helpful to share with others.
Most of us are familiar with the term hypertension, which refers to high blood pressure. Hypotension refers too low blood pressure. Orthostatic is a medical adjective that indicates a condition relating to or caused by an upright posture. Orthostatic hypotension is a condition in which your blood pressure falls significantly when you stand up quickly.
Blood pressure is written as two numbers; for example, 120 over 80 mm Hg. The first number is the systolic pressure. This is the pressure in the arteries when the heart beats and fills them with blood. The second number is the diastolic pressure. This is the pressure in the arteries when the heart rests between beats.
Orthostatic hypotension is defined as a fall in systolic blood pressure (top number) of at least 20 mm Hg or diastolic blood pressure (bottom number) of at least 10 mm Hg when a person stands. (In many cases this drop can be far more significant.) This drop in blood pressure is caused by delayed constriction of blood vessels in the lower body, which normally occurs to maintain an adequate blood pressure when changing to a standing position. As a result, blood pools in the blood vessels of the legs for a longer period, and less is returned to the heart, thereby leading to a reduced cardiac output.
Low blood pressure causes the feeling of light headedness and can lead to fainting. This condition contributes significantly to the risk of falling and injury (as if PD doesn’t cause enough problems on its own).
OH can be caused by multiple conditions:
- Heart and/or Circulation Problems
- Endocrine Problems (Thyroid issues, Hypoglycemia, Diabetes)
- Nervous Systems Disorders, such as Parkinson’s Disease
Approximately 1 in 5 people with Parkinson’s have OH, and when OH is associated with a nervous system disorder, it is called neurogenic orthostatic hypotension (nOH). When you have nOH, researchers believe the underlying cause is that the body does not release enough norepinephrine.
Be aware that a lot of the recent attention to nOH on the web and at conferences is educational marketing by Lundbeck Pharmaceuticals, which has a vested interest in marketing their prescription drug, Northera. The informational website nOHMatters.com has some useful information, but is essentially educational marketing by a pharmaceutical company.
There’s no real magic bullet for treating OH, but there are some strategies to help manage it.
Key strategies are postural adjustments, blood volume expansion, medications/lifestyle to constrict blood vessels, compression garments and exercise.
I am not a doctor, and this is not medical advice. Consider these suggestions/strategies to be potential areas of discussion with your doctor.
Postural Adjustments and Countermeasures
- Avoid rising to a standing position too quickly.
- When getting out of bed, start by moving to a seated position first. Wait some period of time before slowly leaning into a stand.
- Similarly, when getting out of a car, keep your body supported and slowly rise out of the car.
- Many sources recommend elevating the head of your bed by 10 to 20 degrees or 4 inches (10 cm) to decrease nighttime hypertension (high BP), which should reduce the degree of blood pressure drop when rising.
- Physical countermeasures are techniques to contract the muscles below the waist for about 30 seconds at a time, which reduces blood volume in lower body peripheral vessels and encourages blood flow return to the heart. These countermeasures can help maintain blood pressure during daily activities and should be considered at the first symptoms of orthostatic hypotension symptoms or when standing for prolonged periods of time:
- Leg-crossing and contraction
- Thigh muscle co-contraction
- Bending at the waist
- Slow marching in place
- Leg elevation(See “Role of physical countermaneuvers in the management of orthostatic hypotension: efficacy and biofeedback augmentation” – https://www.ncbi.nlm.nih.gov/pubmed/8790259)
Blood Volume Expansion (Hydration)
- Stay hydrated. Drink a lot of water. My friend’s doctor recommended that he drink 90 ounces of water every day. (The American Society of Hypertension recommends 1.5 to 2 liters.)
- If you are exercising or exerting yourself in the heat, you will need even more water to stay hydrated.
- Rapidly drinking 16 ounces (500 ml) of water can increase the standing systolic blood pressure by more than 20 mm Hg for about 2 hours, improving symptoms and orthostatic endurance. This technique can be used when prolonged standing is expected, or prior to exercise. (See “The pressor response to water drinking in humans: a sympathetic reflex?” – https://www.ncbi.nlm.nih.gov/pubmed/10662747)
- Increase salt/sodium intake. obviously, you need to talk to your doctor about this first. Sodium increases fluid retention.
- Maintain a high potassium diet, as high sodium intake promotes potassium loss. Eat bananas.
Medications/Lifestyle to Constrict Blood Vessels
- Alcohol dilates blood vessels and dehydrates. Most sources recommend avoiding and/or limiting alcohol. If drinking alcohol, it is extremely important to also drink water.
- Caffeine has different effects on different people. It is dehydrating, so if consuming caffeine, additional water intake is essential. It is generally thought that caffeine dilates blood vessels, which would make it bad for orthostatic hypotension. However, caffeine generally raises blood pressure, which may be helpful for some cases of OH. There are some theories that caffeine primarily dilates smaller capillaries, as opposed to the major blood vessels. Bottom line: Listen to your body, and pay attention to how your body reacts, you may need to avoid caffeine, or you may need your daily fix.
- A recent Michael J. Fox Foundation webinar recommends avoiding hot liquids. Hot liquids too generally promote blood vessel dilation, while cold liquids promote constriction. Caffeine drinkers with OH may want to consider cold beverage options.
- Prescription drugs that are often considered for treatment include Fludrocortisone (Florinef), Midodrine (ProAmatine), Droxidopa (Northera), Octreotide and Pyridostigmine. See the references at the bottom of this article for links to research papers that provide more details on these medications.
- Compression hose or abdominal binders may help reduce blood pooling in legs. Abdominal compression is considered more significant, as this area represents 20-30% of overall blood volume. A clinical study found that an elastic abdominal binder that exerted 15 to 20 mm Hg of pressure on the abdomen raised the standing blood pressure by about 11/6 mmHg. (See “Use of lower abdominal compression to combat orthostatic hypotension in patients with autonomic dysfunction” – https://www.ncbi.nlm.nih.gov/pubmed/15241645)
- Above all else, stay hydrated. Exercise in hot weather or that causes excessive sweating can lower blood pressure.
- Take breaks, as necessary, when exercising. Rapidly drink 16 ounces (500 ml) of water before exercise.
- Sustained vigorous exercise may lower blood pressure. Take breaks and stay hydrated. OH will make it more difficult to improve conditioning and stamina.
- Mild physical exercise improves orthostatic tolerance by reducing venous pooling and increasing plasma volume.
- Because upright exercise may increase the drop in blood pressure, training in a seated or horizontal position (eg, swimming, stationary biking, seated/bench weight training) may be more tolerable.
- Work with a physical therapist or personal trainer that can help design an exercise program that will offer you the maximum benefit.
If you need a Doctor that specializes in OH…
Key Sources for More information:
- “Preventing and treating orthostatic hypotension: As easy as A, B, C” – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2888469/
- “ASH Position Paper: Evaluation and Treatment of Orthostatic Hypotension” – http://onlinelibrary.wiley.com/doi/10.1111/jch.12062/full
- Michael J. Fox Foundation Webinar “Blood Pressure and Parkinson’s” – https://www.michaeljfox.org/page.html?hot-topics-webinar-series&navid=webinar-series
- Mayo Clinic “Orthostatic Hypotension” – http://www.mayoclinic.org/diseases-conditions/orthostatic-hypotension/basics/definition/con-20031255
- Lundbeck Pharmaceuticals – nOH Matters Website – https://www.nohmatters.com
- American Autonomic Society Website – http://www.americanautonomicsociety.org