Powering a Pacemaker from Your Heartbeat
Published : 2012-11-05 - Updated : 2015-10-30
Author : American Heart Association
Synopsis* : Device converts energy from beating heart to provide electricity to power a pacemaker eliminating need for replacement when batteries are spent.
An experimental device that converts energy from a beating heart could provide enough electricity to power a pacemaker. Such pacemakers could eliminate the need for surgeries to replace pacemakers with depleted batteries.
A Pacemaker is defined as a small device placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate. A pacemaker can relieve some arrhythmia symptoms, such as fatigue and fainting. A pacemaker also can help a person who has abnormal heart rhythms resume a more active lifestyle.
- Speed up a slow heart rhythm.
- Help control an abnormal or fast heart rhythm.
- Prevent dangerous arrhythmias caused by a disorder called long QT syndrome.
- Coordinate electrical signaling between the upper and lower chambers of the heart.
- Make sure the ventricles contract normally if the atria are quivering instead of beating with a normal rhythm (a condition called atrial fibrillation).
- Coordinate electrical signaling between the ventricles. Pacemakers that do this are called cardiac resynchronization therapy (CRT) devices. CRT devices are used to treat heart failure.
- Pacemakers also can monitor and record your heart's electrical activity and heart rhythm. Newer pacemakers can monitor your blood temperature, breathing rate, and other factors. They also can adjust your heart rate to changes in your activity.
An experimental device converted energy from a beating heart to provide enough electricity to power a pacemaker, in a study presented at the American Heart Association's Scientific Sessions 2012.
The findings suggest that patients could power their pacemakers - eliminating the need for replacements when batteries are spent.
In a preliminary study, researchers tested an energy-harvesting device that uses piezoelectricity - electrical charge generated from motion.
The approach is a promising technological solution for pacemakers, because they require only small amounts of power to operate, said M. Amin Karami, Ph.D., lead author of the study and research fellow in the Department of Aerospace Engineering at the University of Michigan in Ann Arbor.
Piezoelectricity might also power other implantable cardiac devices like defibrillators, which also have minimal energy needs, he said.
Today's pacemakers must be replaced every five to seven years when their batteries run out, which is costly and inconvenient, Karami said.
"Many of the patients are children who live with pacemakers for many years," he said. "You can imagine how many operations they are spared if this new technology is implemented."
M. Amin Karami, Ph.D., University of Michigan in Ann Arbor
Researchers measured heartbeat-induced vibrations in the chest. Then, they used a "shaker" to reproduce the vibrations in the laboratory and connected it to a prototype cardiac energy harvester they developed. Measurements of the prototype's performance, based on sets of 100 simulated heartbeats at various heart rates, showed the energy harvester performed as the scientists had predicted - generating more than 10 times the power than modern pacemakers require.
The next step will be implanting the energy harvester, which is about half the size of batteries now used in pacemakers, Karami said. Researchers hope to integrate their technology into commercial pacemakers.
Two types of energy harvesters can power a typical pacemaker: linear and nonlinear. Linear harvesters work well only at a specific heart rate, so heart rate changes prevent them from harvesting enough power.
In contrast, a nonlinear harvester - the type used in the study - uses magnets to enhance power production and make the harvester less sensitive to heart rate changes. The nonlinear harvester generated enough power from heartbeats ranging from 20 to 600 beats per minute to continuously power a pacemaker.
Devices such as cell phones or microwave ovens would not affect the nonlinear device, Karami said.
Co-authors are David J. Bradley, M.D., and Daniel J. Inman, Ph.D. Author disclosures are on the abstract.
The National Institute of Standards and Technology and National Center for Advancing Translational Sciences funded the study.
You're reading Disabled World. Be sure to check out our homepage for further informative disability news, reviews, disability sports events, exclusive stories and how-tos. You can also find us on Twitter, Facebook, and LinkedIn.
Related Medical Devices and Products Documents
- 1: LifeVest Wearable Personal Defibrillator Information : LifeVest personal defibrillator delivers a shock to restore the heart to a regular rhythm and is worn by people at risk of sudden cardiac arrest.
- 2: Beaming Power to Medical Chips Within the Body : Wireless system safely transmits energy to small chips paving the way for new electroceutical devices to treat illness or alleviate pain.
- 3: Old Person Smell: When Older People Smell Different : Aging odor, or old person smell, in senior citizens does not come from poor hygiene but from deteriorated anti-oxidating body defenses.
- 4: What Are Bariatric Aids, Products, Equipment : Information and definition of bariatric equipment and aids that caters for the larger person and feature increased weight capacities.
- 5: How Do Medical Alert Systems Work : Information regarding the operation and components that make up the operation of home medical alert systems.
*Disclaimer: Disabled World provides general information only. Materials presented are in no way meant to be a substitute for professional medical care by a qualified practitioner, nor should they be construed as such. Any 3rd party offering or advertising on disabled-world.com does not constitute endorsement by Disabled World. View our Advertising Policy for further information. Please report outdated or inaccurate information to us.
Journal: Disabled World. Language: English (U.S.). Author: American Heart Association. Electronic Publication Date: 2012-11-05 - Revised: 2015-10-30. Title: Powering a Pacemaker from Your Heartbeat, Source: <a href=https://www.disabled-world.com/assistivedevices/medical/pacemaker.php>Powering a Pacemaker from Your Heartbeat</a>. Retrieved 2021-04-18, from https://www.disabled-world.com/assistivedevices/medical/pacemaker.php - Reference: DW#223-9370.