linguistic:paraphrasing, structural:expansion
Early advanced care

Some ACLS ambulance providers will administer medications to manage pain, arrhythmias, shock, and pulmonary congestion; monitor the heart rhythm to identify any potentially lethal cardiac arrhythmias; or initiate transcutaneous pacing. ACLS ambulance providers use the mnemonic "MONA" (morphine, oxygen, nitroglycerin, and aspirin) to reflect the out-of-hospital therapies they will use for cardiac arrest.