Topic: Congestive Heart Failure
Heart failure — disorder of the heart (either functional or structural) that diminishes the ability of the heart to fill with or eject blood effectively.
Common Causes of Heart Failure
Types of Heart Failure
Impaired function of the left ventricle (is further specified as Systolic or Diastolic Heart Failure).
| ▸ | Impaired ventricular contraction |
| ▸ | Left ventricular ejection fraction (LVEF) < 50% |
| ▸ | Ischemic heart disease is the most common cause |
| ▸ | Impaired ventricular relaxation, limiting filling |
| ▸ | LVEF typically > 55% |
| ▸ | Common causes include CAD, hypertension, diabetes, and obesity |
Impairment in both contraction and relaxation.
Advanced disease with symptoms at rest or minimal exertion.
Diagnostic Criteria
Clinical Symptoms
Diagnostic Testing
| ▸ | Chest X-ray or CT scan |
| ▸ | Electrocardiogram (EKG) |
Used to evaluate cardiac function, particularly ejection fraction (EF), which reflects the percentage of blood ejected from the left ventricle per beat:
Laboratory Testing
Released in response to ventricular stretch and pressure.
Additional Testing
| ▸ | Transesophageal echocardiogram (TEE) |
| ▸ | Cardiac catheterization (to evaluate underlying etiology) |
Treatment Approaches
| ▸ | Lifestyle modifications (smoking cessation, diet, exercise) |
| ▸ | Pharmacologic therapy (e.g., antihypertensives, diuretics) |
| ▸ | GDMT: ACE-I, angiotensin II receptor blockers, mineralocorticoid receptor antagonist (spironolactone), sodium glucose cotransporter-2 inhibitors (Jardiance) |
| ▸ | Device therapy (e.g., pacemaker and/or implantable defibrillator), when indicated |
Coding Considerations
May result from prescribed medications, over-the-counter agents, or illicit substances.
Comorbidity Relationships
There is an assumed relationship between:
CDI Practice Considerations
| ▸ | Review procedural documentation carefully (e.g., cardiac catheterization, pacemaker insertion, stent placement), as specificity impacts ICD-10-PCS coding and DRG assignment. |
| ▸ | Terms such as "decompensated" and "exacerbation" are equivalent to acute on chronic. |
| ▸ | If pleural effusion is documented and minimizes with treatment of CHF, do not code separately. If treated separately (thoracentesis), code pleural effusion in addition to CHF. |
| ▸ | Chronic substance abuse leading to heart failure is not coded as poisoning or adverse effect. |
For admissions involving fluid overload
Assign CHF as principal diagnosis.
Assign fluid overload as principal diagnosis.
Query Opportunity
Clarify type (systolic, diastolic, combined) and acuity (acute, chronic, acute on chronic) of heart failure.
| ▸ | Documentation of unspecified heart failure defaults to I50.9, resulting in a loss of clinical specificity and potentially underrepresenting patient severity. |
| ▸ | When reported as a secondary diagnosis, specificity is critical, as: |
| • Identification of the heart failure type may support Comorbidity (CC) capture. | |
| • Documentation of acute or acute-on-chronic heart failure may support Major Comorbidity (MCC) capture. |
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