Question

lo 3.4. what does the electrocardiogram record?
records your hearts oxygen level
records your hearts muscle mass
records your hearts blood pressure
records your hearts temperature
records your hearts electrical activity

Explanation:

An electrocardiogram (ECG or EKG) is a medical test that measures the electrical activity of the heart. It records the electrical signals generated by the heart's chambers as they contract and relax. This helps in diagnosing various heart conditions such as arrhythmias (abnormal heart rhythms), heart attacks, and other heart - related problems. The other options are incorrect:

• Oxygen level in the heart is not directly recorded by an ECG. Pulse oximeters are used to measure oxygen saturation in the blood.
• Heart muscle mass is typically evaluated through imaging techniques like echocardiography (using ultrasound) or MRI (Magnetic Resonance Imaging).
• Blood pressure is measured using a sphygmomanometer (for manual measurement) or automated blood pressure monitors.
• Heart temperature is not a parameter measured by an ECG.

Answer:

Records your heart's electrical activity