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Updated: Aug 8, 2025

Functional and Morphological Assessment of Diaphragm Innervation by Phrenic Motor Neurons
Published on: May 25, 2015
Compound motor action potentials in transient and persistent phrenic nerve injury - metanalysis
Marcin Kuniewicz1, Marcin Kowalski2, Grzegorz Karkowski3
1Department of Anatomy; Department of Electrocardiology, Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland. kuniewiczm@gmail.com.
Right phrenic nerve injury (PNI) during cryoballoon ablation is rare. Using compound motor action potentials (CMAP) significantly reduces persistent PNI risk and speeds nerve recovery time.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Devices
Background:
- Right phrenic nerve injury (PNI) is a potential complication during cryoballoon ablation (CBA) for atrial fibrillation.
- The incidence of PNI varies widely (4.73%–24.7%) based on CBA generation and protective strategies.
- PNI can be transient or persistent, impacting patient outcomes.
Conclusions:
- Right PNI extending beyond hospitalization is an infrequent complication.
- Compound motor action potentials (CMAP) significantly mitigate the risk of prolonged phrenic nerve injury.
- CMAP application accelerates nerve recovery following cryoballoon ablation procedures.
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