Table 2.
Predictive value of EPS in CS.
| VA+ | VA− | Raw | Percent | Raw | Percent | |||
|---|---|---|---|---|---|---|---|---|
| All patients (n = 25) | ||||||||
| EPS+ | 10 | 0 | PPV | 10/10 | 100 | Sns | 10/11 | 91 |
| EPS− | 1 | 14 | NPV | 14/15 | 93 | Spc | 14/14 | 100 |
| Patients with LVEF >35% and no prior VA (n = 12) | ||||||||
| EPS+ | 2 | 0 | PPV | 2/2 | 100 | Sns | 2/3 | 67 |
| EPS− | 1 | 9 | NPV | 9/10 | 90 | Spc | 9/9 | 100 |
| Patients with ICDs in situ (n = 17) | ||||||||
| EPS+ | 10 | 0 | PPV | 10/10 | 100 | Sns | 10/11 | 91 |
| EPS− | 1 | 6 | NPV | 6/7 | 86 | Spc | 6/6 | 100 |
| Patients with LVEF >35%, no prior VA, and ICDs in situ (n = 7) | ||||||||
| EPS+ | 2 | 0 | PPV | 2/2 | 100 | Sns | 2/3 | 67 |
| EPS− | 1 | 4 | NPV | 4/5 | 80 | Spc | 4/4 | 100 |
EPS = electrophysiology study; LVEF = left ventricular ejection fraction; ICD = implantable cardioverter defibrillator; NPV = negative predictive value; PPV = positive predictive value; Sns = sensitivity; Spc = specificity; VA = ventricular arrhythmia.