Early and Late Complications of COVID-19

The following patients are included in the Registry: Patients 18 years and older diagnosed
with COVID-19, in accordance with the current guidelines of the Ministry of Health of Poland,
after full recovery (resolution of clinical symptoms, minimum 14 days after last symptoms).
The Registry includes patients with and without hospitalization .

Approval from the Bioethics Committee of Lodz Regional Medical Chamber to conduct the
Registry was obtained.

The Registry was held at the: Saint Family Hospital Medical Center, Lodz, Poland Patient
information, course of the disease, post-COVID-19 complaints, comorbidities and current
treatment were collected at visit "0" within 4-8 weeks after the end of COVID-19.

Subsequently, patients were ordered the following tests:

- 12-lead ECG

- 24-hour Holter ECG monitoring

- 24-hour Holter blood pressure monitoring

- Echocardiographic of the Heart assessment

- Biochemical tests: Lipid Profile (total cholesterol, LDL fraction, HDL, triglycerides),
glucose or glycosylated hemoglobin (HbA1c) level, D-dimers.

In patients with indications, the following were additionally performed: MRI of the heart,
Angio CT of pulmonary vessels, Angio CT of coronary vessels or other diagnostic tests.
Depending on the indications of the pts, they were referred for other tests and specialist
consultations. All pts were diagnosed and treated in accordance with the current
recommendations of the European Cardiology Society (ESC) and Polish Cardiac Society (PCS).

If any abnormalities were found, patients were treated in accordance with the current ESC
guidelines. In the event of complications after COVID-19, each patient will be treated in
accordance with current guidelines and recommendations, in accordance with current medical
knowledge.

After a period of 3 months after COVID-19, new symptoms that appeared after COVID-19,
remained and/or worsened after COVID-19 were assessed at the follow-up visit, based on the
patient's interview. If such symptoms occurred, patients were classified as LONG-COVID.
Symptoms that may have resulted from the severity of the underlying condition were not
classified as LONG-COVID.

Patients with LONG-COVID, after excluding complications/contraindications, will be referred
to the post-COVID rehabilitation program. This program covers a comprehensive range of
rehabilitation with dietary and psychological consultations. Patients referred to the
rehabilitation program will constitute the REHA-STOP-COVID group. The rehabilitation program
will last 6 weeks. At the beginning and at the end of the program, each patient will have
fitness assessment performed with the following tests:

- oxygen saturation assessment performed with a pulse oximeter;

- physical capacity assessment with 6 minute walking test (6MWT)

- Dyspnea assessment with modified 0-10 Borg scale

- Fatigue assessment with Modified Fatigue Impact Scale (MFIS)

- Muscle Strength Assessment

- lower extremity function and mobility with Short Physical Performance Battery test
(SPPB)

Annual reassessment of all patients is planned for 5 years after COVID-19.

During the control visits, patients will be ordered the following:

- Clinical evaluation with health assessment, comorbidities and symptoms that may be due
to a history of COVID-19

- 12-lead ECG

- 24-hour Holter ECG monitoring

- 24-hour Holter blood pressure monitoring

- Echocardiographic of the Heart assessment

- Biochemical tests: Lipid Profile (total cholesterol, LDL fraction, HDL, triglycerides),
glucose or glycosylated hemoglobin (HbA1c).

Additionally, a questionnaire will be completed by the patient with an assessment of his/her
health, weight, height, BMI, risk factors for cardiovascular diseases (smoking, alcohol
abuse), physical activity, all medications that the patient takes, whether the patient was
re-infected with SARS-CoV in the past years (date) , whether the patient was vaccinated (with
full vaccination date).

Each patient from the STOP-COVID program, in the event of deterioration of health and / or
the appearance of new ailments, may be referred for the consultation to the Saint Family
Hospital Medical Center by a GP and/or another specialist during the whole period of the
study.

During the entire study period, the following will be registered in the medical database:

1. Any new medical event assessed by 2 doctors as a complication after COVID-19

2. Any hospitalization related to complications of COVID-19 as well as any other reason

3. Each severity has already been diseases diagnosed and treated, with information whether
it required correction / modification of the current treatment

4. Any newly diagnosed diseases

5. Any abnormalities in the results of diagnostic examinations, laboratory tests and
consultations