| A | B |
| Left midaxillary | V6 goes here |
| Prematrue atrial contractions | Earlier than expected P wave |
| Fourth Interconstal Right Sternal | V1 lead goes here |
| Augmented | One of the lead types |
| Atrial Fibrillation | Many irregular P waves & QRS complexes/minute |
| Fifth Intercostal Midclavicular Left | V4 goes here |
| Horizontal | Axis representing time on ECG tracing |
| Left Anterior Axillary | V5 goes here |
| Replorization | Represented by the T wave |
| Atrial Depolarization | Represented by the P wave |
| Sinus Tachycardia | More than 100 beats/minute |
| Premature Ventricular Contractions | Wide QRS complexes without preceding P waves |
| Alternating Current | A ECG artifact |
| Einthovens Triangle | Pictoral guide to lead placement |
| Ventricular tachycardia | Three or more consective PVCs |
| Ventricular Depolarization | Represented by the QRS complex |
| Deflection | Movement away from the ECG baseline |
| Fourth Intercostal Left Sternal | V2 goes here |
| Somatic Tremor | A ECG artifact |
| Paroxysmal Atrial Tachycardia | No visible P waves |
| Myocardial Infarction | Broad and deep Q waves |
| Sinus Bradycardia | Less than 60 beats/minute |