The effect of different respiratory rehabilitation protocols on cardiac recovery and hemodynamic parameters before and after coronary artery bypass graft surgery (CABG).

Investigating the effect of different respiratory rehabilitation protocols on cardiac recovery and hemodynamic parameters before and after coronary artery bypass graft surgery (CABG).

Clinical trial with control group, unblinded, randomized, with parallel groups, on 75 patients. A table of random numbers was used for randomization.

This study is carried out as a clinical trial on 75 patients who are candidates for coronary artery bypass surgery, referring to Masih Deneshvari Hospital in Tehran, Iran. Patients who meet the study entry criteria will be placed in one of the study groups after providing full explanations and signing a written consent form.

Inclusion criteria include all patients who are candidates for coronary artery bypass surgery, exclusion criteria include age over 70 years, left main coronary artery (LMCA) lesion, history of MI, chest pain during exercise, and ECG changes during exercise.

The first group includes patients who do not receive respiratory rehabilitation exercises before and after surgery (control group). The second group includes patients who perform respiratory rehabilitation exercises only after surgery. The third group includes patients who perform respiratory rehabilitation exercises before and after surgery.

Cardiac output, end-diastolic volume, end-systolic volume, left ventricular dimensions at the end of diastole, left ventricular dimensions at the end of systole, left ventricular extensor index, 6-minute walking test distance, resting heart rate, oxygen saturation at rest, maximum heart rat, VO2 max, fatigue level during activity, dyspnea

Simple randomization method, individual randomization unit and random number table randomization tool. For randomization, we use a table consisting of random digits from 0 to 9. Each of the figures in this table is repeated the same on average. In this method, each figure is assigned to a treatment group. We start from the first row of the table and move down row by row. For three groups, we put numbers 1 to 3 for the first group, numbers 4 to 6 for the second group, and numbers 7 to 9 for the third group. We continue the above process until three groups are completed.