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  1. Before
  2. After
  Before:

Abstract

Objective: An aim of this study was to assess prognostic factors for return to normal heart beat following mitral valve repair.

Methods: 250 patients underwent mitral valve repair, including 150 patients who underwent mitral valve repair only (60%). The remaining patients underwent concomitant procedures including MAZE procedure. Patients were followed up for 4 years.

Results: Preoperative heart rhythm, duration of preoperative a-fib, and left atrial increase were significant prognostic factors for return to NSR following surgery. A probability of postoperative return to NSR was 95% if NSR was present before surgery. The probability of postoperative return to NSR was 82% when preoperative atrial fibrillation was occasional or of fewer than one years in duration. The probability of postoperative return to NSR was lower when preoperative atrial fibrillation was present for greater than one year. There was no difference in survival between patients who were in NSR before surgery and those who were in atrial fibrillation. However, postoperative return to NSR resulted in a significant increase in postoperative survival (98% +/-1% and 95% +/-4% at 2 and 4 years for patients in NSR against 96% +/-2% and 80% +/-5% at 2 and 4 years for cases in atrial fibrillation p<0.05).

Conclusion: Because postoperative NSR gives better survival rates, mitral valve repair should be performed during the patient is still in NSR or when atrial fibrillation is still paroxysmal. Surgery may also be indicated in cases of permanent atrial fibrillation provided it does not exceed a certain parameter.

  After:

Abstract

Objective: 1 The An aim of this study was to assess the prognostic factors for return to normal heart beat sinus rhythm (NSR) 1 following mitral valve repair.

Methods: 250Two-hundred and fifty 2 patients underwent mitral valve repair, including 150 patients who underwent mitral valve repair only (60%). The remaining patients underwent concomitant procedures including the MAZE procedure. Patients were followed up for 4 four 3 years.

Results: Preoperative heart rhythm, duration of preoperative a-fib atrial fibrillation 4, and left atrial increase enlargement were significant prognostic factors for return to NSR following surgery. A The probability of postoperative return to NSR was 95% if NSR was present before surgery preoperatively. The probability of postoperative return to NSR was 82% when preoperative atrial fibrillation was occasional paroxysmal or of fewer less than one years in duration. The probability of postoperative return to NSR was lower when preoperative atrial fibrillation was present for greater more than one year. There was no significant difference in survival between patients who were in NSR before surgery and those who were in atrial fibrillation. However, postoperative return to NSR resulted in a significant increase in postoperative survival (98% +/-1% and 95% +/-4% at 2 and 4 years for patients in NSR against versus 96% +/-2% and 80% +/-5% at 2 and 4 years for cases patients in atrial fibrillation p<0.05).

Conclusion: Because postoperative NSR gives yields better survival rates, mitral valve repair should be performed during while the patient is still in NSR or when while atrial fibrillation is still paroxysmal. Surgery may also be indicated in cases of permanent atrial fibrillation provided it does not exceed a certain parameter. 5

2 Notes

  1. The term ‘normal sinus rhythm’ is preferable to ‘normal heart beat’ in a scientific paper. The first time you mention this, you should write it in full. For following mentions, you can write the abbreviation: NSR.
  2. When a number starts a sentence, it should be written in letters.
  3. Numbers less than 10 are usually written in letters, unless they are actual data.
  4. ‘A-fib’ is a casual expression. In a scientific paper, the term ‘atrial fibrillation’ should be used.
  5. 3 It is unclear what you mean to say here. Perhaps you mean to say: ‘Surgery may also be indicated in patients with long-standing atrial fibrillation provided it does not result in excess mortality.’

4 Additional Notes

  • You may want to write the words ‘Objective’, ‘Methods’, ‘Results’ and ‘Conclusion’ in italics or bold to make them stand out.