
Take two slow, deep breaths (more if necessary).

Patients who already have daily practice of cardiac coherence.
CARDIAC COHERENCE TRIAL
Signing of informed consent before any specific trial procedure.Patient hospitalized at the Institute of cancer of Montpellier the day before his cytoreductive surgery (at T1 = D-1).Patient affiliated to a French social security system.Patients with sufficient command of the French language.Patients who scored strictly above 3 on the visual analogue anxiety scale and/or the psychological distress scale.Patients with peritoneal carcinosis awaiting cytoreductive surgery.Subjective anxiety score by using the state-trait anxiety inventory form A (STAI-Y form A) questionnaire.Number of patients satisfied with the cardiac coherence program.Reasons of non-participation reported by patients and registered in the form of inclusion.Number of cardiac coherence sessions per day and by patient.Concentration of salivary immunoglobulin A.The position on the left being the absence of pain and the position on the right an unbearable pain. The distance between their mark and one end (or the mid-point) of the scale is recorded. The points at which respondents make their mark represent where they perceive their answer to lie in this continuum. These scales require respondents to place a mark on a line on which opposing statements or descriptions are placed at either end of a (usually) 10 cm line. It's a visual analogue scale which is also known as linear analogue scale. The secondary objectives are to evaluate the implementation of this program in a cancer center, its adoption by the patients and the impact of this practice on their anxious symptomatology, immunological response and quality of life.
CARDIAC COHERENCE PC
The main objective of this study is to evaluate adherence to a cardiac coherence program aimed at reducing anxiety in patients with PC awaiting cytoreductive surgery. Several pilot studies justify its interest in oncology. Cardiac coherence corresponds to a physiological state of balance of the autonomic nervous system obtained through precise and rigorous breathing exercises.

Among the various existing non-drug interventions, a targeted cardiac coherence program seems promising. It is therefore essential to assess the feasibility and relevance of implementing a non-drug intervention known for its anxiolytic and antidepressant effects, to respond early and appropriately to the distress and anxiety of patients with PC before and after their surgery. Studies evaluating relevant psychological interventions to treat these disorders are rare. This complementary therapy should be integrated in the overall management of cancer patients, especially since anxiolytics (e.g., benzodiazepines) have shown limitations in clinical trials compared with placebo or standard care.

All learned societies (e.g., American Society of Clinical Oncology - ASCO), associations (e.g., Union for International Cancer Control (UICC), World Cancer Research Fund International - WCRF) and authorities (e.g., French National Institute of Cancer) recommend both the screening and treatment of this psychological distress. These disorders impair their quality of life, their health behaviours, their therapeutic alliance with caregivers, and represent a risk factor for mortality since access to care, lifestyle and therapeutic adherence differ. Psychological distress, which most frequently results in emotional anxiety and depressive disorders, affects nearly 40% of patients in oncology.
