You are a volunteer at one of Pusat Pemindahan Sementara during this recent flood incident in Malaysia. Suddenly, a young lady came to you and asked you to check on his father who complained pain on his central chest. He looked anxious and sweating profusely. He also had difficulty in breathing. His daughter informed you that her father had history of IHD, hypertension and hyperlipidemia.

On examination, the vital signs are:
HR: 65 beat/min
RR: 20 breaths/min
BP: 94/70 mmHg
SpO₂: 90%
While you were checking on his vital signs, he suddenly become unconscious.

What would be the information you wanted to know during history taking?

Explain the possible diagnoses for the patient.

Describe the management for the patient at scene before the arrival of medical team.