| Term | Definition |
| 428 Heart Failure is | heart's inability to properly pump |
| 3 heart failure effects: | Fluid collects in lungs, inhibiting gas exchange, Kidney blood doesn't filter well, circulation suffers |
| congestive heart failure | 428.0 |
| systolic/diastolic/both heart failure | 428.2 / 428.3 / 428.4 |
| Heart failure chest xray remarks: | batwing, butterfly, hilar congestion, bronchial edema, Kerley B lines, heart enlargement |
| echocardiograph | measures amt of blood pumped each beat |
| SSS 427.81 | Sick sinus syndrome, pacemaker |
| WPW 426.7 | Wolff-Parkinson-White syndrome, catheter ablation |
| Atrioventricular AV heart blocks | 426.1x three degrees |
| Sinus tachycardia 427.89 | heart rate over 90 bpm |
| Cardiac Arrest 427.5 | cause unknown, or code cause first |