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Articles by H Ahn
Total Records ( 2 ) for H Ahn
  M. A Rowe , H Ahn , A. Pe Benito , H Stone , A Wilson and J. Kairalla
 

Persons with dementia are at particular risk for injuries and unattended home exits. The purposes of this study were to prospectively describe the characteristics and determine the hazard rates of unattended home exits and injuries. A total of 9 times over 12 months, data were collected from 53 caregivers of persons with dementia about persons with dementia unattended home exits or injuries. A total of 24% of persons with dementia had at least 1 unattended exit; 4 participants exited multiple times. Men and younger persons with dementia were significantly more likely to exit than women or older individuals. A total of 30% of persons with dementia sustained injuries in 29 separate incidents; all but 3 injuries were caused by falls, and 38% of injuries resulted in nursing home placement. The hazard rate of untoward events was high, at approximately 1 unattended exit and 1 fall per person-year. For all persons with dementia living in the community, health care plans should include specific interventions to prevent these untoward events.

  Y. J Kim , D. A Kwon , J. S Park , S Hahn , K. H Kim , K. B Kim , D. W Sohn , H Ahn , B. H Oh and Y. B. Park
 

Background— We sought to identify preoperative predictors of clinical outcomes after surgery in patients with severe tricuspid regurgitation.

Methods and Results— We prospectively enrolled 61 consecutive patients (54 women, aged 57±9 years) with isolated severe tricuspid regurgitation undergoing corrective surgery. Twenty-one patients (34%) were in New York Heart Association functional class II, 35 (57%) in class III, and 5 (9%) in class IV. Fifty-seven patients (93%) had previous history of left-sided valve surgery. Preoperative echocardiography revealed pulmonary artery systolic pressure of 41.5±8.7 mm Hg, right ventricular (RV) end-diastolic area of 35.1±9.0 cm2, and RV fractional area change of 41.3±8.4%. The median follow-up duration after surgery was 32 months (range, 12 to 70). Six of the 61 patients died before discharge; thus, operative mortality was 10%. Three of the 55 patients who survived surgery died during follow-up, and 6 patients required readmission because of cardiovascular problems. Thus, 46 patients (75%) remained event free at the end of follow-up. In the 54 patients who underwent 6-month clinical and echocardiographic follow-up, RV end-diastolic area decreased by 29%, with a corresponding 26% reduction in RV fractional area change. Thirty-three patients (61%) showed improved functional capacity after surgery. On multivariable Cox regression analysis, preoperative hemoglobin level (P<0.001) and RV end-systolic area (P<0.001) emerged as independent determinants of clinical outcomes. On receiver operating characteristic curve analysis, we found that RV end-systolic area <20 cm2 predicted event-free survival with a sensitivity of 73% and a specificity of 67%, and a hemoglobin level >11.3 g/dL predicted event-free survival with a sensitivity of 73% and a specificity of 83%.

Conclusions— Timely correction of severe tricuspid regurgitation carries an acceptable risk and improves functional capacity. Surgery should be considered before the development of advanced RV systolic dysfunction and before the development of anemia.

 
 
 
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