The effect and impact of postponing cardiac surgery / creating a waiting list as a result of COVID-19 on patients, both psychologically and symptomatically on three groups of patients:

1. The degree of anxiety and/or depression induced by their altered medical care trajectory.
2. The incidence of medical problems induced by deferred elective surgery or delayed postoperative ambulatory visit
3. The occurrence of reduced access to medical and psychological help

A prospective study by means of a questionnaire, specifically designed for each of the three groups.

1. Adult patients whose operation date has been deferred
2. Patients who did not have had an operation date
3. Patients who have been operating on during the month before

Each group will receive a twofold questionnaire:

Part I: Hospital Anxiety and Depression Scale (HADS), a robust questionnaire used for hospitalized and non-hospitalized patients gauging the degree of anxiety and/or depression, irrespective of their specific medical condition. All three groups receive the same list of questions.

-Part II: a questionnaire made up specifically for issues concerning the medical/psychological/access aspects during the COVID-19 outbreak. Each of the three groups will receive a questionnaire, adapted to the group they are assigned to.

The questionnaires will be delivered by the use of Qualtrics or on paper. Timing and mode of presentation (Qualtrics or fill-in paper on admission) of the questionnaire will depend on the length of the quarantine measures.

Inclusion Criteria:

All adult patients whose operation date has been deferred due to the pandemic COVID-19.

All patients who did not have had an operation date before the pandemic COVID-19.

All patients who have been operating on during the month before the pandemic COVID-19.

Exclusion Criteria:

N/A