Non-invasive Quantification of Atrial Fibrosis by MRI in Atrial Fibrillation (QUAFI)

Public Assistance-Hospitals of Marseille (AP-HM)

Status

Completed

Conditions

Atrial Fibrillation

Treatments

Device: MRI 3T

Study type

Interventional

Funder types

Other

Identifiers

NCT02885883

2011-04

2011-A00285-36

Details and patient eligibility

About

Three groups of patients will be considered: a control group (n = 10); a group of patients with paroxysmal or persistent AF with AF cryoablation procedure - within this group, MRI will replace CT-scan usually performed in routine before the procedure (n = 15); a group of patients with permanent AF (n = 15). MRI study will include pulmonary veins angiography with gadolinium injection (0.20 mmol/kg), 2D-cine imaging and late-enhancement imaging. A 3D gradient-echo sequence(Flash 3-D) will then be applied 20 minutes after the injection, with the following parameters : echo time 0.98 ms, repetition time 2.53 ms, angle 15°, resolution 2.0x1.3x1.0 mm. T1 map and two T2 sequences will be performed so as to determine LA relaxation times. Argus software will be used for post-treatment imaging. Quantitative data will be expressed in mean ± SD. A comparison of T1 and T2 values in LA will be performed between the three groups. Statistics will be performed with SPSS software in bilateral analysis and a value of p < 0.05 will be considered as significant.

Enrollment

31 patients

Sex

All

Ages

18+ years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

All persons > 18 years, which have:

gp paroxysmal or persistant FA

paroxysmal or persistent FA (under one year),
refractory to at least one antiarrhythmic drug therapy
eligible for an ablation procedure with cryotherapy
the patient may benefit from surveillance. gp permanent FA permanent AF ( defined as chronic arrhythmia after 2 failed attempts to electrical cardioversion and / or more than one year old) , and hospitalized for cardiac reasons or not in different cardiology Timone .

Exclusion criteria

age < 18 years,
cons -indications to MRI ( claustrophobia, pacemakers and implantable cardiac defibrillators , metal chips intra ocular , valvular mechanical prosthesis ) , allergy to gadolinium ,
renal impairment ( creatinine clearance <60 mL / min)
pregnant or nursing ( a pregnancy test must be performed for women of childbearing age at the time of inclusion , the result of this test will be communicated to them .
the MRI examination takes place three months after the inclusion women of childbearing potential should be placed under effective contraception)