There are multiple definitions:

1. acute pulmonary embolism(English)

   • remains a significant cause of mortality and morbidity despite increasing prophylaxis for deep venous thrombosis
   • DTV, IVC
   • Pulmonology, Thrombocyte /thrombosis
   • https://doi.org…90/jcdd12090333

2. apurinic–apyrimidinic endonuclease(English)

   • plays a central role in repair of DNA damage due to reactive oxygen species because its DNA 3′-phosphoesterase activity removes 3′ blocking groups in DNA that are generated by DNA glycosylase/AP-lyases during removal of oxidized bases and by direct ROS reaction with DNA
   • DNA, ROS, UV, APE-1
   • Genetics
   • https://doi.org…/pnas.95.9.5061

3. atom percent excess(English)

   • COSIAM, ESI, FSR, HCA, LH, MPB, OVX, PCOS
   • Menstruation, Exercise & Training, Myocyte / muscle, Metabolism, Hormone
   • https://doi.org/10.1113/JP287342

4. acute pulmonary edema(English)

   • the second most common clinical presentation of AHF (14–38%), though its reported prevalence and in-hospital mortality may vary considerably by geographic region. Also as APO
   • ADHF, AHF, APO, ARF, ARHF, CHAMPIT, CS, ID, NCC, RV
   • Pulmonology, Cardiology, Pathology
   • https://doi.org…-031-96562-3_23