The French Randomized Optimal Stenting Trial: a prospective evaluation of provisional stenting guided by coronary velocity reserve and quantitative coronary angiography. F.R.O.S.T. Study Group.
OBJECTIVE
We sought to make a prospective comparison of systematic stenting with provisional stenting guided by Doppler measurements of coronary velocity reserve and quantitative coronary angiography.


BACKGROUND
Despite the increasing use of stents during percutaneous transluminal coronary angioplasty, it is unclear whether systematic stenting is superior to a strategy of provisional stenting in which stents are placed only in patients with unsatisfactory results or as a bail-out procedure.


METHODS
Two hundred fifty-one patients undergoing elective coronary angioplasty were randomly assigned either to provisional stenting (group 1, in which stenting was performed if postangioplasty coronary velocity reserve was <2.2 and/or residual stenosis > or =35% or as bail-out) or to systematic stenting (group 2). The primary end point was the six-month angiographic minimal lumen diameter (MLD). Major adverse cardiac events were secondary end points (death, acute myocardial infarction and target lesion revascularization).


RESULTS
Stenting was performed in 48.4% of patients in group 1 and 100% of patients in group 2 (p<0.01). Six months after angioplasty, the MLD did not differ between groups (1.90+/-0.79 mm vs. 1.99+/-0.70 mm, p = 0.39), as was the rate of binary restenosis (27.1% vs. 21.4%, p = 0.37). Among patients with restenosis, 13/32 (40.6%) in group 1 but 100% (25/25) in group 2 had in-stent restenosis (p<0.01). Target lesion revascularization (15.1% vs. 14.4% in groups 1 and 2 respectively, p = 0.89) and major adverse cardiac events (15.1% vs. 16.0%, p = 0.85) were not significantly different.


CONCLUSIONS
Systematic stenting does not provide superior angiographic results at six months as compared with provisional stenting.
Lafont
A
A
Hôpital Bouciaut, Paris, France. antoine.lafont@bcc.ap-hop-paris.fr
Dubois-Randé
J L
JL
Steg
P G
PG
Dupouy
P
P
Carrié
D
D
Coste
P
P
Furber
A
A
Beygui
F
F
Feldman
L J
LJ
Rahal
S
S
Tron
C
C
Hamon
M
M
Grollier
G
G
Commeau
P
P
Richard
P
P
Colin
P
P
Bauters
C
C
Karrillon
G
G
Ledru
F
F
Citron
B
B
Marié
F N
FN
Kern
M
M
D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D017023:Coronary Angiography; D003327:Coronary Disease / Q000628:therapy*; D003331:Coronary Vessels / Q000473:pathology; D015150:Echocardiography, Doppler; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D015607:Stents