EKG Acquisition and Stress Test Complications: Key Concepts for Technicians

What are common complications during stress testing?

Abnormal vital signs, including excessive tachycardia, hypotension, and arrhythmias.

What should be done if hypotension occurs during a stress test?

Notify the provider and have the patient lie supine with legs elevated.

What arrhythmias should be observed during stress testing?

PVCs, ventricular tachycardia, supraventricular tachycardia, and heart blocks.

What signs indicate ischemia during an EKG?

T wave inversion and ST segment changes.

What is the preferred patient position for a 12-lead EKG?

A supported supine position without pillows.

What position may be necessary for patients with orthopnea during EKG?

Semi-Fowler's position (45-degree elevation).

What should be done if a patient experiences itching or redness at electrode sites?

Call the provider's office.

Is it okay to remove the electrodes while wearing a Holter monitor?

No.

What is the purpose of the crash cart in EKG testing?

To ensure emergency equipment and supplies are readily available.

What is a wandering baseline in an EKG?

A recording that demonstrates wavelike up-and-down movements due to improper electrode placement.

What causes somatic tremor artifacts on an EKG?

Muscle movement, which can be due to shivering or conditions like Parkinson's disease.

What is AC interference in EKG readings?

Electrical interference caused by any electronic device on or near the patient.

What should be done to reduce wandering baseline issues?

Reposition limb leads and ensure they are on fleshy areas.

What is the process of repolarization in the heart?

Moving sodium from inside the cell to the outside and potassium from outside to the inside during the heart's relaxation phase.

What is the recommended action if a patient is nervous during EKG testing?

Explain the procedure thoroughly to reduce nervous movements.

What should be checked in the crash cart before performing an EKG?

Ensure it is fully stocked, check expiration dates of medications, and ensure the defibrillator is working.

What is the significance of documenting alterations in patient positioning?

To ensure accurate diagnostic interpretation and maintain patient safety.

What is the role of filters in EKG machines?

To remove external interference from the EKG readings.

What should patients be instructed about Holter monitor usage?

They should not remove electrodes or the battery and can continue usual activities.

What is the importance of patient positioning during cardiac testing?

It prevents waveform changes and ensures accurate diagnostic interpretation.

What should be done if a patient experiences a cardiac arrest during testing?

Emergency resuscitation measures should be initiated immediately.

What is the purpose of having a chair or railing nearby during a stress test?

To provide support for the patient during the test.

What factors can cause EKG artifacts?

Patient movement, loose or dry electrodes, and improper skin preparation.

What is the recommended action if a patient is experiencing labored breathing during EKG?

Position them appropriately and ensure comfort to minimize movement.

How can electrode placement affect EKG readings?

Improper placement can lead to artifacts and inaccurate readings.

What is AC interference in EKG?

AC interference is electrical interference caused by electronic devices near the patient, recognized as uniform sharp spikes on the EKG tracing.

What can cause artifacts on an EKG tracing?

Artifacts can be caused by cell phone interference, electrical currents in walls, and medical devices like insulin pumps.

What should be done to minimize AC interference during an EKG?

Ensure the patient's cell phone is off, move the exam table away from walls, and check that the ground prong of the plug is secure.

What is an interrupted baseline in EKG?

An interrupted baseline is a tracing that is not continuous, indicating broken lead wires or disconnected leads.

What are signs of patient distress during stress testing?

Signs include dizziness, lightheadedness, nausea, severe shortness of breath, tingling sensations, numbness, chest pain, and extreme fatigue.

What should be done if a patient complains of distress during a stress test?

Stop the test and notify the physician immediately.

How often should a patient be monitored post-stress testing?

The patient should be monitored every 3 to 5 minutes for approximately 10 to 15 minutes post-testing.

What is a negative deflection in EKG?

A negative deflection is the downward presentation of waveforms on the EKG tracing.

What does a positive deflection indicate in EKG?

A positive deflection indicates that the leads are properly attached, resulting in upward waveforms.

What is the significance of Einthoven's triangle in EKG?

Einthoven's triangle is disrupted when limb leads are reversed, affecting the accuracy of EKG readings.

What should be verified before running an EKG?

Verify that demographic data is accurate, leads are properly attached, and the recording is clear of artifacts.

What are the first three leads recorded in a 12-lead EKG?

Leads I, II, and III, which are bipolar leads recording impulses between specific limb positions.

What is the role of unipolar leads in EKG?

Unipolar leads (AVL, AVR, AVF) require assistance from two poles to enhance the tracing due to poor waveform illustration.

Where should limb electrodes be placed for EKG?

Limb electrodes should be placed on fleshy areas of the skin, mirroring positions on each limb.

How do you locate the angle of Louis for electrode placement?

Locate the base of the throat and move downward to find the top of the sternum, then identify the second intercostal space.

What is the midclavicular line?

An imaginary line through the middle of the clavicle that extends vertically.

What is the midaxillary line?

An imaginary line through the axillary region that separates the front and back of the human body.

What is the importance of maintaining EKG equipment?

Proper maintenance prevents issues like breaks in recording due to dirty styluses or detached lead wires.

What should be done if the EKG tracing is not continuous?

Check for broken lead wires or disconnected leads and ensure all connections are secure.

What is the target heart rate during a stress test?

The target heart rate is calculated as [220 - age] x 0.85.

What is the role of the EKG technician during a stress test?

The technician monitors the patient, checks connections, and ensures accurate recording throughout the procedure.

What happens if the stylus is dirty during EKG recording?

A dirty stylus can cause breaks in the recording, leading to inaccurate EKG results.

What is the significance of the calibration mark in EKG?

The calibration mark should be 10 mm high and 5 mm wide to verify speed and gain settings.

What should be done if the EKG recording shows artifacts?

Investigate potential sources of interference, such as nearby electronic devices or poor lead connections.

What is the purpose of augmenting unipolar leads?

Augmenting unipolar leads enhances the waveform illustration for better accuracy in readings.

What is the procedure for placing precordial electrodes?

Electrodes should be placed carefully to avoid bone and ensure accurate recording from different focal points in the heart.

What is the fourth intercostal space used for in EKG lead placement?

It is the location for placing leads V1 and V2.

Where is lead V1 placed?

In the fourth intercostal space, right of the sternum.

Where is lead V2 placed?

In the fourth intercostal space, left of the sternum.

What color lead is used for the right arm?

White.

What color lead is used for the left arm?

Black.

What color lead is used for the left leg?

Red.

What color lead is used for the right leg?

Green.

What is the purpose of color-coding leads in EKG?

To ensure proper connection for accurate tracings.

What is the standard setup for a five-lead EKG?

V1 (Red), V2 (Yellow), V3 (Green), V4 (Blue), V5 (Orange), V6 (Purple).

What is a Holter monitor?

A common type of ambulatory monitoring that records heart activity over a period.

What is the three-lead EKG primarily used for?

Emergency departments and telemetry monitoring.

Where is the white lead placed in a three-lead EKG?

On the right shoulder just below the clavicle.

What is the function of the ground lead in a five-lead EKG?

To provide a reference point for the electrical activity being recorded.

What modifications are made for stress testing EKGs?

Limb leads are placed on the torso to minimize motion artifact.

What is the placement for the green lead in a stress test?

On the right lower abdominal area.

What should be done if a patient has had a distal extremity amputation?

Leads can be moved to just above the knees and elbows.

What is the significance of the brown lead in a five-lead setup?

It provides similar information to lead V1 in a standard 12-lead tracing.

What does the term 'artifacts' refer to in EKG monitoring?

Unwanted electrical signals that can interfere with the accuracy of the EKG tracing.

What is the purpose of the precordial leads?

To record electrical activity from specific focal points of the heart.

What does the term 'Einthoven's triangle' refer to?

The arrangement of electrodes in a three-lead EKG.

What is the typical duration for ambulatory monitoring?

24 hours or longer.

How should leads be placed for patients with specific cardiac conditions?

Placement may need to be modified based on the patient's anatomy or skin condition.

What is the role of the ground wire in a five-lead EKG?

To serve as a reference point for the electrical signals being measured.

What is the location for placing lead V4?

In the fifth intercostal space at the left midclavicular line.

What is the function of telemetry monitoring?

To monitor heart activity over extended periods, usually in a hospital setting.

What should be done prior to using an EKG device?

Refer to the device's user manual for specific instructions.

What is the function of a three-channel EKG unit?

It records three leads at once and is typically found in ambulatory care settings.

What does a single-channel EKG machine do?

It records one lead at a time and produces a running strip.

How does digital technology improve EKG data management?

It allows rapid collection and distribution of data across the healthcare system.

What is an artifact in EKG tracing?

A mark on the EKG tracing caused by factors other than the heart's electrical activity.

What is the purpose of electrolyte gel in EKG electrodes?

It serves as a conductor of the impulses to transmit heart activity.

What can cause artifacts in EKG recordings?

Poor-quality or expired electrodes or gel, or improperly attached lead wires.

What does EKG graph paper represent on its axes?

The vertical axis represents gain (amplitude), and the horizontal axis represents time.

What is the standard paper speed for EKG machines?

The most common paper speed is 25 mm/second.

What is the significance of the calibration marker in EKG tracings?

It indicates the standard settings of paper speed and amplitude for accurate interpretation.

What should be done to prepare a patient's skin for EKG testing?

The skin should be clean and dry, avoiding lotions or oils, and hair may need to be clipped or shaved.

What is the recommended gain setting for EKG machines?

The normal gain setting is 10 mm/mV.

What equipment is needed for conducting an EKG test?

EKG machine, graph paper, electrodes, lead wires, alcohol wipes, and patient comfort items.

What is the role of the EKG technician during testing?

To prepare the patient, connect electrodes and lead wires, and conduct the test.

What should be done if lead wire clips cannot securely connect to electrodes?

Replace any leads that cannot securely connect.

What is the effect of increasing the paper speed to 50 mm/second?

It makes the EKG appear to slow down, allowing clearer visibility of waveforms.

What is the purpose of daily inspections of EKG equipment?

To minimize the possibility of equipment malfunction during procedures.

What cleaning method is recommended for lead wire clips after each use?

Use isopropyl alcohol or alcohol-based cleansers for adequate disinfection.

What is the importance of maintaining a clean work environment for EKG testing?

It helps prevent artifacts and ensures effective patient care.

What happens if the EKG graph paper is running low?

A thick band of color (usually pink or red) indicates it needs to be replaced soon.

What is the purpose of using alcohol wipes before electrode placement?

To reduce artifacts by cleaning the skin at the attachment sites.

What can lead to improper recording of waveforms in EKG testing?

Improperly attached lead wires or poor connections.

What is the typical number of electrodes used in an EKG setup?

Usually 10 electrodes are used to record heart activity from 12 angles.

What is the effect of reducing the amplitude setting to 5 mm/mV?

It is necessary for waveforms that are too large and exceed the height of the paper.