DBV30053 Unit 2.1: Electrocardiograph

What is the general function of an Electrocardiograph (ECG)?

• Measuring lung capacity

• Detecting electrical signals associated with cardiac activity

• Monitoring oxygen levels in the blood

• Measuring blood pressure

Answer explanation

The general function of an Electrocardiograph (ECG) is detecting electrical signals associated with cardiac activity.

What is the purpose of Einthoven's triangle in electrocardiography?

• Recording blood pressure

• Determining the electrical axis of the heart

• Analyzing lung function

• Measuring muscle tremors

Answer explanation

Einthoven's triangle is used in electrocardiography to determine the electrical axis of the heart, not for recording blood pressure, analyzing lung function, or measuring muscle tremors.

What should be done to prevent possible damage to the keypad of an electrocardiograph?

• Do not use sharp or hard objects to press keys

• Use excessive force to press keys

• Clean the keypad with water and soap

• Store the device in a humid environment

Answer explanation

To prevent possible damage to the keypad of an electrocardiograph, do not use sharp or hard objects to press keys.

What is the main cause of AC interference in an ECG machine?

• Electricity leakage from the ECG machine

• Muscle tremors

• Incorrect paper usage

• Expired paper usage

Answer explanation

The main cause of AC interference in an ECG machine is electricity leakage from the ECG machine.

What is the function of a Patient Simulator in testing an ECG machine?

• To clean the internal printer of the ECG machine

• To check heartbeat reading on the ECG machine using the simulator

• To measure blood pressure

• To analyze lung function

Answer explanation

The function of a Patient Simulator in testing an ECG machine is to check heartbeat reading on the ECG machine using the simulator.

What is the significance of the P waves, QRS complex, and T waves in an ECG waveform?

• They indicate oxygen levels in the blood

• They detect muscle tremors

• They vary in amplitude and polarity

• They measure blood pressure

Answer explanation

The significance of the P waves, QRS complex, and T waves in an ECG waveform is that they vary in amplitude and polarity.

What should be done to avoid a possible explosion when using an electrocardiograph?

• Use the device with wet hands

• Use the device in a confined space

• Use the device near flammable substances

• Do not use the electrocardiograph in the presence of flammable anaesthetics

Answer explanation

Do not use the electrocardiograph in the presence of flammable anaesthetics

What is the purpose of forming the patient cable into a loose loop before storing?

• To prevent mechanical or electrical failures

• To measure lung capacity

• To analyze heart function

• To monitor oxygen levels in the blood

Answer explanation

Forming the patient cable into a loose loop before storing helps prevent mechanical or electrical failures by reducing strain on the cable.

What is the role of a Defibrillator Analyzer with ECG Function in medical devices?

• To analyze heart function

• To clean the internal printer of the ECG machine

• To check heartbeat reading on the ECG machine using the simulator

• To measure blood pressure

Answer explanation

The role of a Defibrillator Analyzer with ECG Function in medical devices is to check heartbeat reading on the ECG machine using the simulator.

What is the main cause of muscle tremor interference in an ECG?

• Incorrect paper usage

• Electricity leakage from the ECG machine

• Expired paper usage

• Stiffening of the body due to nervousness

Answer explanation

The main cause of muscle tremor interference in an ECG is the stiffening of the body due to nervousness.