Coronary Angiography Clinical Trial
The purpose of this study is to confirm the utility for hypnosis in the coronary angiographic examination. The technique would be an alternative to prevent the consumption of anesthesic drugs.
The coronary angiography is a medical imaging acquisition used in cardiology to highlight the
coronary arteries after a coronary disease suspicion. According to an expert consensus it is
performed under local anesthesia. Indeed the examination is quite painless, apart from the
initial arterial puncture. Moreover, any patient chest pain must be detected during the
examination to locate the guilty coronary injury. This is not possible with a patient under
general anesthesia.
But, no general anesthesia may be a source of anxiety for patients, and the technique can be
painful at several times: during the puncture, the exploration of probe into the winding,
spastic or over-calcified arteries, or even during the dilation by the balloon swelling which
obstructs downstream the artery.
The efficiency evaluation of the hypnosis made by INSERM in 2015 concludes that "the use of
hypnosis during a surgical practice or during a medical or a interventional radiological act
allows to reduce the consumption of sedative drugs and/or pain medication preoperatively".
The study hypothesis, is that hypnosis can contribute to a decreasing of anxiety and the pain
for patients undergoing coronary angiography, and even a decreasing of complications due to a
better control of hemodynamic (heart rate and blood pressure).
It could entail a better comfort for operator during the coronary angiography.
Primary objective :
To compare the initial anxiety state before the coronary angiographic performing scheduled
for adults with no earlier coronary angiography, according to they will undergo a hypnotic
session or not before the examination, with posthypnotic suggestions of self-hypnosis to make
during the coronary angiography.
Secondary objective :
To compare between the two groups of patients:
- pain during and after the coronary angiography
- hemodynamic factors heart rate, blood pressure before and after the examination
- operator comfort
- use of sedative drugs, pain medication and local anesthesia
- outbreak of major and minor complications
Primary endpoint :
Anxiety measured using self-report questionnaire (STAI-Y-A ), before coronary angiography
Secondary endpoints :
Trait anxiety (STAI-Y-B questionnaire) State anxiety the eve of coronary angiography Pain
before and during the coronary angiography : Visual Analog Scale (VAS) Heart rate and blood
pressure before and after the coronary angiography Comfort for the operator of the
angiography : Likert scale into 5 points (1 : the worst comfort, 5 : the best possible
comfort) Dose of sedative drugs, pain medication and local anesthesia injected during the
coronary angiography Outbreak of major complications during the coronary angiography (death,
stroke, tamponade, hemorrhagic shock, anaphylactic shock against the imaging tracer,
ventricular tachycardia or ventricular fibrillation, severe bradycardia) or minor
complications (vagal reaction, hematoma at the puncture point, skin allergy)
Methodology :
Efficiency comparative study, randomized, simple-blind (angiography operator in blind),
single center, routine clinical care Only one medical check per patient
Procedures :
When a patient is taken over in cardiology department the eve of a scheduled coronary
angiography, the cardiologist purposes them to take part in this study.
If they accept, a first evaluation of anxiety (trait and state) is performed. The following
day, before going to the coronary angiography room, the patients are splitted randomly into
two groups :
- A group of patients which undergo a hypnotic session before examination with
posthypnotic suggestions of self-hypnosis to be performed during the angiography. A
medical prescription for anxiolytics can be made according to the patient clinical signs
of anxiety
- Another group becomes only a prescription of anxiolytics according to the patient
clinical signs of anxiety.
The State Anxiety is measured after the setting of the patient in the coronary angiography
room, before performing the examination. The pain and the hemodynamic factors are measured
during and after the coronary angiography. The comfort of operator is evaluated too.
The patients will be contacted by phone one month after the coronary angiography to evaluate
their satisfaction with their medical care.
Patients number :
Assuming that the control group has a mean score of 50 (standard deviation 10) with STAI-Y A,
and a clinically significant difference (from 5 points), 85 patients must be included in each
group, so totally 170 patients.
Trial Duration :
Expected study start: first semester of 2016 Inclusion duration: 12 months Duration per
patient: 1 mois Total study duration: 18 months (including the data analysis et the report of
results)
Statistical Analysis:
- Primary objective: comparison of the mean scores STAI-Y A between the two groups (T test
of Student), with adjustment on the potential factors of confusion (multiple linear
regression)
- Secondary objective: comparison of the quantitative criteria (T tests of Student) and
qualitative criteria (Fischer's exact test) between the two groups.
Expected Benefits :
Since coronary angiography is an invasive procedure without general anesthesia affecting a
noble organ, this procedure could be anxiogenic and even psychologically traumatic emergency.
Not practice under general anesthesia prevents potential risks for the patient, but anxiety,
non-comfort and pain are existing. We think that hypnosis could improve the patient care
psychologically and physically and for any invasive procedure.
In this case, fewer or no sedative drugs and pain medication will be necessary, and it would
decrease their potential iatrogenesis, the patient care will be improved. It will be an
alternative for patient to decrease their drugs consumption.
Quality Assurance Plan :
Data will be recorded in a Paper Case Report from medical records. The patients will undergo
only one medical examination for the study. No follow-up is expected.
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