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Updated: Jul 18, 2025

Ultrasonographic Assessment During Cardiopulmonary Resuscitation
Published on: October 24, 2020
Amplitude spectrum area measured in real-time during cardiopulmonary resuscitation - How does this technology work?
Laura Ruggeri1, Francesca Fumagalli1, Giulia Merigo2
1Department of Acute Brain and Cardiovascular Injury, Istituto di Ricerche Farmacologiche Mario Negri, IRCCS, Milan, Italy.
Abstract:
Amplitude spectrum area (AMSA) is one of the most accurate predictors of defibrillation outcome. Details on functioning and use of the available technology to measure AMSA during cardiopulmonary resuscitation (CPR) in the real clinical scenario are described. During chest compression (CC) pauses for ventilations, AMSA is promptly calculated and values displayed through a modified defibrillator. In addition, real-time AMSA analysis has the additional promise to monitor CPR quality, being AMSA threshold values contingent on CC depth. Future larger studies employing this new technology are now needed to demonstrate the impact of AMSA on survival of cardiac arrest.
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