Clinical Study

NP-59 SPECT/CT Imaging in Stage 1 Hypertensive and Atypical Primary Aldosteronism: A 5-Year Retrospective Analysis of Clinicolaboratory and Imaging Features

Table 2

Qualitative analysis by HTN stage ( ).

CharacteristicsAll ( )Stage 1 HTN ( )Stage 2 HTN ( )

Class of antihypertensives
 ≧33 (27)0 (0)3 (100)
 <38 (73)8 (100)0 (0)
PAC
 Elevated7 (64)5 (63)2 (67)
 Normal4 (36)3 (37)1 (33)
PRA
 Suppressed2 (18)2 (25)0 (0)
 Nonsuppressed9 (82)6 (75)3 (100)
ARR
 Elevated5 (45)3 (37)2 (67)
 Normal6 (55)5 (63)1 (33)
Serum K (mEq/L)
 Normal (>3.5)5 (46)4 (50)1 (33)
 3 ≦ Serum K < 3.53 (27)3 (38)0 (0)
 2 ≦ Serum K < 33 (27)1 (12)2 (67)
Presentations
 Clinical4 (36)
  Stage 2 HTN + 2 ≦ Serum K < 32 (cases 14, 16)
  Stage 2 HTN + Serum K > 3.51 (case 22)
  Stage 1 HTN + 2 ≦ Serum K < 31 (case 18)
 Subclinical7 (64)
  Stage 1 HTN + 3 ≦ Serum K < 3.53 (cases 12, 20, 21)
  Stage 1 HTN + Serum K > 3.54 (cases 13, 15, 17, 19)
Confirmatory testing
 Positive 1 (9)1 (12)0 (0)
 Negative 7 (64)5 (63)2 (67)
 Not done 3 (27)2 (25)1 (33)
CT lesion
 Positive (nodule)7 (64)6 (75)1 (33)
 Adrenal puffiness 2 (18)0 (0)2 (67)
 Negative 2 (18)2 (25)0 (0)
NP-59 Planar
 Positive 4 (36)4 (50)0 (0)
 Faint1 (9)1 (12)0 (0)
 Negative 6 (55)3 (38)3 (100)
NP-59 SPECT/CT
 Positive 11 (100)8 (100)3 (100)

Abbreviations are the same as Table 1. Data are expressed as number (percentage).