Department of Emergency Medicine the University of Cincinnati Cincinnati 45267 USA;
Department of Emergency Medicine Banner University Medical Center-Tucson Tucson 85719 USA;
Department of Emergency Medicine Banner University Medical Center-Tucson Tucson 85719 USA;
Baptist Medical Center Jacksonville Jacksonville 32207 USA;
Flagstaff Medical Center Flagstaff 86001 USA;
Northwest Medical Center Tucson 85741 USA;
Department of Emergency Medicine the University of Cincinnati Cincinnati 45267 USA;
Department of Emergency Medicine the University of Arizona Tucson 85724 USA;
Pericardiocentesis; Pericardial effusion; Point-of-care ultrasound; Emergency department; Subxiphoid; Parasternal; Apical;