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Browse VivaQuant patents and IP related to Rhythm Express


VivaQuant is located in the heart of the Minneapolis/St. Paul area, which boasts one of the highest concentrations of med tech firms in the world. The Twin Cities provide an excellent growth environment as a result of a well-developed infrastructure and educated work force. Medtronic, Boston Scientific, St. Jude Medical, Greatbatch Medical, Starkey, and 3M Medical Products have major facilities or are headquartered here.


VivaQuant was founded in 2009 by Marina Brockway, PhD after experiencing her Mother’s difficulty and frustration with a prescribed ambulatory monitoring device and recognizing the need for better arrhythmia detection accuracy and ECG clarity.

Core Values

  • Innovate
  • Create reliable and easy-to-use products

  • Treat customers and employees fairly – earn their respect and trust

  • Provide products and technology that make a difference


Our team has extensive experience in the design, manufacturing and marketing of biomedical research products, medical devices and ambulatory diagnostics and monitoring solutions. Specific technology expertise includes signal processing, ultra-low-power embedded systems, sensors, low-power mixed signal design and RF telemetry.

Brian Brockway, MSEE
Brian Brockway, MSEEPresident and CEO
Brian founded Data Sciences Intl. (DSI), the leading provider of wireless implantable sensors and systems for preclinical testing of new drugs and biomedical research. He bootstrapped DSI with highly competitive SBIR grants from the National Institutes of Health into a highly profitable business with > $40 mm revenue. He developed a domestic and international direct sales and distribution network serving 40 countries on five continents. DSI was named to the Inc. 500 list of America’s fastest growing private companies for three consecutive years, was named SBA Exporter of the Year, and won the Tibbetts Award for commercialization of technology developed with SBIR grants. DSI also received several awards and recognition for technology innovation and creative financing strategies during Brian’s tenure.

Brian co-founded Transoma Medical in 2003 to develop insertable cardiac monitoring devices for patients with chronic cardiovascular disease. Transoma gained FDA clearance and achieved a $5M run rate prior to sale of the technology to Wilson Greatbatch during the 2009 financial crisis.

Brian has about 51 patents issued and pending in medical devices, sensors, and diagnostics and is co-author of more than 25 scientific publications (792 citations, 5,315 reads, 415 total research interest on Research Gate).

Brian Brockway, MSEE
Marina Brockway, PhD, MBAFounder and Chief Technology Officer
Marina is founder and Chief Technology Officer of VivaQuant. She is a high-energy collaborative and hands-on leader with a unique combination of education and experience in artificial intelligence, signal processing, embedded systems, cloud computing, cardiovascular physiology, statistics, intellectual property strategy, and digital health IT and medical device development and commercialization. She is an invited speaker and expert in the development of algorithms for ultra-low-power implementation of embedded systems. Prior to founding VivaQuant, Marina spent several years in the cardiac rhythm management and neurostimulation divisions of Guidant (currently Boston Scientific). She has about 80 issued and 10 pending patents in the fields of signal processing and systems for monitoring ambulatory subjects and for management of patients with chronic cardiovascular disease. She has co-authored seven peer-reviewed scientific publications in engineering, signal processing, and medicine. Marina holds a PhD in applied mathematics, a Master’s degree in physiology, and an MBA.
Brian Brockway, MSEE
Christian TaconetChief Commercialization Officer
Chris is Chief Commercialization Officer of Rhythm Express. He is a proven leader in the Cardiac monitoring field, with 30 years of experience that include several successful startups. Chris was a co-founder and President of Mednet Healthcare Technologies, a remote cardiac monitoring company that created the first IDTF that made proprietary devices and software. The Company grew to $20M in revenue under his leadership. At Medicomp, a United Therapeutics company, Chris held the position of Director of Business Development where he positioned Medicomp as an industry leader. Chris also held executive positions with Medicalgorithmics and InfoBionic where he played a key role in marketing and sales. Chris has developed an extensive network of relationships in the remote cardiac monitoring field with Industry Leaders and Healthcare Providers during his tenure in the field. His experience and passion for remote patient monitoring is evident in his pursuit of establishing Rhythm Express as a leader and creating a new Gold Standard in patient care.
Brian Brockway, MSEE
John Collins, MBAMarketing Director
JC is Director of Marketing for the Rhythm Express product line. He brings 24 years of experience in medical devices, including 18 years at Medtronic, to VivaQuant’s Remote Cardiac Monitoring Systems business. John has held product management, team management, technical support, marketing, and international marketing roles at Medtronic and Transoma Medical. As a product manager, he teamed with the sales force to successfully launch more than 15 products in the Medtronic AF, Cardiac Surgery and Cardiac Rhythm Management divisions. While at Medtronic, he managed global product lines including RF ablation and diagnostic catheters, capital equipment, and delivery systems. He developed several product promotions and training modules for field sales teams and customers. He has close relationships with numerous electrophysiologists and cardiologists in the Midwest, across the nation and overseas. John holds an MBA from the University of St. Thomas.