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Updated: Feb 21, 2026

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects
Published on: February 12, 2021
S P W Guenther1, M Schirren1, A L Boulesteix2
1Department of Cardiac Surgery, University Hospital Munich, Ludwig-Maximilian-University, Munich, Germany.
Cardiopulmonary resuscitation (CPR) quality improved significantly for lay rescuers using the Cardio First Angel™ feedback device, particularly in chest compression depth. The device ensured correct hand positioning, enhancing bystander CPR effectiveness.
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