MAR 26, 2018 5:40 AM PDT

Early Detection of Low Blood Sugar Made Possible with Heart Rate Monitor

WRITTEN BY: Kara Marker

For people with type 1 diabetes, being unaware of a hypoglycemic (low blood sugar) event could be very dangerous. To help people detect these type of events, researchers have adopted a commercially-available heart rate biosensor.

A kit used by a woman with gestational diabetes. Credit: Jessica Merz

Type 1 diabetes is an autoimmune disease where the immune system mistakenly attacks the insulin-producing cells of the pancreas, called beta cells. People with this condition have to self-administer injections of insulin to make up for this loss. Hypoglycemia can lead to seizures, loss of consciousness, and death. And many people with type 1 diabetes do not experience the same warning signs as other people. This impaired awareness of hypoglycemia prevents people from recognizing the state of their blood sugar and can lead to dangerous events.

Some people with impaired hypoglycemia awareness use glucose sensors, but these devices often produce delayed results, skewing the accuracy of glucose measurements. Because of this, scientists found reason for an additional monitor technology.

At the beginning of a hypoglycemic event, the sympathetic nervous system, also known as the “fight or flight response” is activated, which results in increased heart rate, blood pressure, breathing rate, and pupil size. On the other hand, the parasympathetic nervous system, which mostly performs the opposite actions, is suppressed. The new device works on an algorithm designed to detect “beat-to-beat variation” in heartbeats that occurs during hypoglycemia.

Researchers used a commercially-available heart rate and single-lead electrocardiogram (ECG) biosensor, the HealthPatch made by VitalConnect. They tested this biosensor in 27 men and women with type 1 diabetes and self-reported issues with impaired hypoglycemia awareness.

During the study, each participant wore the HealthPatch on their chest along with a continuous glucose meter. They also recorded low blood sugar levels verified by traditional fingerstick measurements. The data collected by the sensor was wirelessly transmitted to a mobile device, where the researchers’ algorithm went to work.

Using the data, researchers evaluated 39 hypoglycemic events and compared them to the results from glucose meters and fingerstick measurements. The algorithm successfully detected hypoglycemic heart rate variability at the start of hypoglycemia in 72 percent of cases. Going forward, researchers plan to improve the accuracy and precision of the algorithm to account for the hypoglycemic events it did not detect. Ideally, the technology would also be able to “translate the data into an audiovisual hypoglycemia alert “that can be sent to a mobile device

"Timely detection of impending hypoglycemia is critical to avoid severe, potentially life-threatening hypoglycemia," explained principal investigator, Marleen Olde Bekkink, MD, PhD. "Our proof-of-principle study found that measuring heart rate variability using a wearable device in an outpatient setting seems promising for alerting to upcoming hypoglycemia."

Sources: American Diabetes Association, PubMed Health, The Endocrine Society

About the Author
  • I am a scientific journalist and enthusiast, especially in the realm of biomedicine. I am passionate about conveying the truth in scientific phenomena and subsequently improving health and public awareness. Sometimes scientific research needs a translator to effectively communicate the scientific jargon present in significant findings. I plan to be that translating communicator, and I hope to decrease the spread of misrepresented scientific phenomena! Check out my science blog: ScienceKara.com.
You May Also Like
MAR 01, 2020
Cardiology
Vegetarian Diet May Reduce Stroke Risk
MAR 01, 2020
Vegetarian Diet May Reduce Stroke Risk
Stroke is the world’s second leading cause of death. Now, researchers from Tzu Chi University in Hualien, Taiwan h ...
MAR 28, 2020
Cardiology
Daily Hot Bath May Reduce Risk for Heart Disease and Stroke
MAR 28, 2020
Daily Hot Bath May Reduce Risk for Heart Disease and Stroke
The Japanese are known for their fondness of long hot baths- be it in their famous onsens, public baths or even just the ...
APR 05, 2020
Cardiology
Fatter Thighs May Help Stave off Heart Disease
APR 05, 2020
Fatter Thighs May Help Stave off Heart Disease
New research has found that a larger thigh circumferences, or ‘fatter thighs’ may be linked to lower blood p ...
APR 18, 2020
Cardiology
Is Good Sleep Necessary for a Healthy Heart?
APR 18, 2020
Is Good Sleep Necessary for a Healthy Heart?
Over 50 million Americans reportedly have trouble sleeping. As research is increasingly finding that having a good night ...
MAY 15, 2020
Technology
What is HARVEY?
MAY 15, 2020
What is HARVEY?
One of the biggest challenges facing clinical workers is trying to explore user interface treatment options easily witho ...
JUN 14, 2020
Chemistry & Physics
Why Are There So Few Black People in STEM?
JUN 14, 2020
Why Are There So Few Black People in STEM?
On June 10th, 2020, thousands of STEM scientists and organizations around the world went on strike to protest systemic r ...
Loading Comments...