---
title: "nyha_heart_failure"
description: "A simple method of classifying the extent of heart failure, as defined by the New York Heart Association."
---

A simple method of classifying the extent of heart failure, as defined by the New York Heart Association.

**Purpose.** To record one or both of:
 - a functional assessment of heart failure based on symptoms; and 
 - an objective assessment based on both evidence of cardiovascular disease and symptoms.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-OBSERVATION.nyha_heart_failure.v1` | openEHR | defines this table |

## Columns

| Column | Type | Null | Description | Source |
|---|---|---|---|---|
| `id` | `uuid primary key` | no | Primary key. | — |
| `form_id` | `uuid` → [`form`](/docs/tables/form) | no | The form this entry was recorded on. | — |
| `form_block_id` | `uuid` | yes | The block within the form, when the entry is bound to one. | — |
| `functional_capacity`<br />`functional_capacity_code`<br />`functional_capacity_system`<br />`functional_capacity_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Functional capacity | `/data[at0001]/events[at0002]/data[at0003]/items[at0004]` |
| `objective_assessment`<br />`objective_assessment_code`<br />`objective_assessment_system`<br />`objective_assessment_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Objective assessment | `/data[at0001]/events[at0002]/data[at0003]/items[at0011]` |
| `confounding_factors` | `text` | yes | Confounding factors | `/data[at0001]/events[at0002]/state[at0016]/items[at0017]` |

## Constraints

```sql
check ((functional_capacity_code is null and functional_capacity_system is null and functional_capacity_valueset_id is null and functional_capacity is null) or (functional_capacity is not null and functional_capacity_code is not null and functional_capacity_system is not null and functional_capacity_valueset_id is not null))
check ((objective_assessment_code is null and objective_assessment_system is null and objective_assessment_valueset_id is null and objective_assessment is null) or (objective_assessment is not null and objective_assessment_code is not null and objective_assessment_system is not null and objective_assessment_valueset_id is not null))
```

## Unique

- `form_block_id`

## References

| Columns | Target | On delete |
|---|---|---|
| `form_id` | [`form`](/docs/tables/form) | cascade |
| `form_id, form_block_id` | [`form_block`](/docs/tables/form_block) | cascade |
| `functional_capacity_valueset_id, functional_capacity_code, functional_capacity_system, functional_capacity` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `objective_assessment_valueset_id, objective_assessment_code, objective_assessment_system, objective_assessment` | [`valueset_code`](/docs/tables/valueset_code) | restrict |

## Indexes

- `nyha_heart_failure_form_id_idx` on `form_id`

## Value sets

| Value set | Codes |
|---|---|
| `org.openehr::openEHR-EHR-OBSERVATION.nyha_heart_failure.v1/functional_capacity` | 6 |
| `org.openehr::openEHR-EHR-OBSERVATION.nyha_heart_failure.v1/objective_assessment` | 4 |