According to a limited study recently published in Nature, researchers were able to detect obstructive HCM (HOCM) using a noninvasive optical sensor contained in many commercial smartwatches.
How the Technology Works
These watches used photoplethysmography, a noninvasive optical method used to detect blood volume changes in the microvascular bed at the skin surface. The same technology is used in clinical pulse oximeters and is now widely incorporated in commercial smartwatches that have heart rate detection.
For this limited study which was included as an adjunct to MyoKardia’s Phase 2 PIONEER-HCM study of the the drug mavacamten (formerly known as MYK-461), 5 HCM centers in the US obtained smart watch data and echocardiograms from 19 HCM patients who had left ventricular outflow tract obstruction. The researchers compared these readings to readings from a control group of 64 healthy volunteers. The researchers were able to identify significant differences between the heartbeats of those patients with HOCM and those of the healthy volunteers.
Potential for Widespread Use
Before this technology can be put into widespread use, more research is needed to support this limited sample. However, in the future, this technology could potentially prove to be an easy and inexpensive way to screen people for obstructive HCM.
DISCLOSURES: HCMBEAT HAS RECEIVED UNRESTRICTED EDUCATIONAL GRANTS FROM MYOKARDIA. ADDITIONALLY, CYNTHIA BURSTEIN WALDMAN OF HCMBEAT SERVES AS A PATIENT ADVISOR ON THE STEERING COMMITTEE FOR MYOKARDIA’S EXPLORER TRIAL.
When Stanford biochemist Jim Spudich settled down in bed with a book recommended by his wife, he had no idea that the book would inspire one of the biggest discoveries of his career. Spudich drifted off to sleep while reading The Haunted Mesa, a science fiction novel by Louis L’Amour. His scientific discovery was based on an image he saw in his dreams when the image of a mesa morphed into a myosin molecule.
Continue reading “How a Louis L’Amour Book about the Southwest Inspired a HCM Discovery”
According to this press release, MyoKardia expects to dose the first patient in the EXPLORER-HCM trial of mavacamten (formerly known as MYK-461) for obstructive HCM in the second quarter of 2018.
MyoKardia says that it expects 220 patients to enroll in the 30 week long trial. These patients will be randomly assigned to receive either mavacamten or a placebo. Participants will also be able to continue on their normal beta blockers or calcium channel blockers.
MyoKardia, a San Francisco biotech company currently in clinical trials on a HCM drug called Mavacamten, has come up with a way to spot HOCM simply by using a wristband fitness monitor. The wristband works through the use of optical biosensors which monitor arterial pulse waves.
During MyoKardia’s trials, the bracelet biosensors were used on HOCM patients and non-affected controls. The algorithm was able to distinguish HOCM patients from unaffected individuals more than 95% of the time, suggesting that a non-invasive way to screen for HOCM may not be too far in the future.
The linked article at Medgadget contains an interview with MyoKardia’s Dr. Robert McDowell, MyoKardia’s Chief Scientific Officer, and Dr. Eric Green, MyoKardia’s Senior Director of Translational Research with more on the happenings at MyoKardia.
Editor’s Note: This is the 4th of 4 blog entries which summarizes the presentations given at the recent International HCM Summit VI in Boston. The presenter and their hospital affiliation are noted below, along with the topic of their presentation. When possible, you may access the presenters’ slides via hyperlink by clicking on the name. (Note that not all presenters made their slides available).
Continue reading “HIGHLIGHTS FROM THE INTERNATIONAL HCM SUMMIT, PART IV”