ECG Fundamentals Interpretation, Artifacts, and Cardiac Physiology

ECGs Question Which electrode is considered the ground electrode? This artifact can occur if the electrodes are dirty or expired or if the gel on the electrodes is dried. The _____ is considered the pacemaker of the heart. The patient talks during the ECG. What artifact could occur? The patient’s heart rate is 38 beats per minute. What changes should you make before obtaining the tracing? What chest electrode is placed on the same horizontal plan as V4 at the midaxillary line? What is true regarding the ST segment? What occurs during the QRS complex? The contractive phase of the heartbeat is: A record or recording of electrical impulses of the heart produced by an electrocardiograph. The valve between the left upper and lower chambers of the heart is the: The valve between the left upper and lower chambers of the heart is the tricuspid valve. The patient’s heart rate is 150 beats per minute. What changes should you make before obtaining the tracing? The Q wave represents atrial depolarization. A period of time between two points or events on the ECG tracing. Use of ultrasonic waves directed through the heart to study the structure and motion of the heart is: Lead II is created using the: A resting 12 lead ECG: A patient needs to do an exercise stress test. The patient should not take a dose of Viagra, Cialis, or Levitra for erectile dysfunction ____ hours before a stress test. An ECHO is used to study the electrical activity of the heart. On an ECG tracing, what represents a period of time with no electrical activity? The adult heart rate is below 60 beats per minute, and this is a normal rhythm for well-conditioned athletes. This artifact can occur if the electrodes are placed on bony areas or with the breathing movement. The phase of the heartbeat when the heart is at rest and the atria fill with blood is: This test allows the patient to record an ECG when symptoms occur. The patient may use the test for 30 days. Artifact appears on aVR. Which lead wire and electrode would you check? ________ artifact occurs when the tracing looks normal at the beginning, but then goes all over when the electrical connection is interrupted. The AV node is the pacemaker of the heart. Upward movement away from the baseline in an ECG tracing. What chest electrode is placed on the fifth intercostal space on the mid-clavicular line? The state where the cardiac cells are recovering. This arrhythmia occurs when the ventricles quiver uncontrollably Answer Right leg Wandering baseline SA node Somatic tremor Decrease the chart speed. V6 The ST segment is an isoelectric line. Atrial repolarization and ventricular depolarization systole. ECG and EKG mitral valve. False Increase the chart speed. False Interval ECHO right arm and left leg electrodes. uses 10 electrodes and lead wires. 48 False an isoelectric line Sinus bradycardia Wandering baseline diastole Cardiac event recorder A, B, and C Interrupted baseline False Upward movement away from the baseline in an ECG tracing. V4 Repolarized state Ventricular fibrillation The R wave is a large triangular shaped wave. The valve between the left upper and lower chambers of the heart is the tricuspid valve. This arrhythmia occurs when the atria contracts sooner than they should. The V2 electrode is placed on the fourth intercostal space at the right sternal edge. Which structure is created from the repolarization of the ventricles? What is the default gain or sensitivity? For this condition, place chest electrodes on the right side of the chest using the same intercostal spacing and landmarks. Switch the right and left limb lead wires. ________ artifact appears as jagged peaks with irregular height and spacing. The pacemaker of the heart is the: The atrioventricular bundle is the same as the: What is true regarding standard leads? A patient needs to do an exercise stress test. The patient can drink alcohol and caffeine until ____ hours before the test. On an ECG tracing, what is made up of many waves? Lead III is created using the: A patient needs to do an exercise stress test. The patient should not take a dose of Viagra, Cialis, or Levitra for erectile dysfunction ____ hours before a stress test. True False Premature atrial contraction False T wave 10 mm/mV Dextrocardia Somatic tremor sinoatrial node. bundle of His and AV bundle. Created from a measurement of current traveling from a negative pole to the positive pole 3 Complex left arm and left leg electrode. 48