Table 2.
Atrial Fibrillation and Flutter Outcomes & Risk Determination candidate predictors
| Predictor | Ascertainment & definition | Operational definition | Type* | Degrees of freedom |
|---|---|---|---|---|
| Age | Interview and EMR review | Value in years | c | 3 |
| Sex | Interview | Female/Male | d | 1 |
| 2 hour resting heart rate | Bedside monitor | Value in beats per minute | c | 3 |
| Maximum heart rate in first 2 hours of ED treatment | Bedside monitor | Value in beats per minute | C | 3 |
| Requires iv drug infusion | Review of EMR and electronic order tracker | Yes/No | D | 1 |
| Heart failure | EMR & Echo results | Yes/No | D | 1 |
| Diabetes | Interview and EMR review | Yes/No | D | 1 |
| Valvular heart disease | EMR & Echo results | Yes/No | D | 1 |
| History of CVA or TIA | Interview and EMR review | Yes/No | D | 1 |
| Takes >2 AV node blocker medications | Interview and EMR review | Yes/No | D | 1 |
| Home warfarin use | Interview and EMR review, INR | Yes/No | D | 1 |
| Home digoxin use | Interview and EMR review, digoxin level | Yes/No | D | 1 |
| Dyspnea in ED | Interview and EMR review | Yes/No | D | 1 |
| Palpitations in ED | Interview and EMR review | Yes/No | D | 1 |
| Atrial flutter on ECG | Review of ECG and EMR | Yes/No | D | 1 |
| BNP | Core laboratory test | Laboratory value | C | 2 |
| BUN | Core laboratory test | Laboratory value | C | 2 |
| Troponin I | Core laboratory test | Laboratory value | C | 2 |
| Overall Degrees of Freedom | 27 | |||
*
Type of variable: c = continuous; d = dichotomous; AV, atrioventricular; BNP, B-type natriuretic peptide; BUN, blood urea nitrogen; CVA, cerebrovascular accident; ECG, electocardiography; Echo, echocardiography; ED, emergency department; EMR, electronic medical record; INR, international normalized ratio; TIA, transient ischemic attack.