PubMed Health⌕ Search

Biomedical subjects

Hui-Hsun Huang

Publications and source records attributed to Hui-Hsun Huang.

4 recordsLinked to original sources

Heart rate variability characterization in daily physical activities using wavelet analysis and multilayer fuzzy activity clustering.

A portable data recorder was developed to parallel measure the electrocardiogram and body accelerations. A multilayer fuzzy clustering algorithm was proposed to classify the physical activity based on body accelerations. Discrete wavelet transform was incorporated to retrieve time-varying characteristics of heart rate variability under different physical activities. Nine healthy subjects were included to investigate activity-related heart rate variability during 24 h. The results showed that the heartbeat fluctuations in high frequencies were the greatest during lying and the smallest during standing. Moreover, very-low-frequency heartbeat fluctuations during low activity level (lying) were greater than during high activity level (nonlying).

Activities of Daily Living↗

Acute cardiovascular collapse after pericardial drainage in a patient with aortic dissection.

Proximal aortic dissection is frequently associated with cardiac tamponade. The treatment sometimes is difficult. We present a 69-year-old female patient who after repeated episodes of syncope received an open drainage of pericardial effusion that ended in a fatal outcome. She was also known to have mural thrombi in the aorta. However, preanesthetic trransesophageal echocardiography revealed besides pericardial effusion, also dilatation of aortic root which compressed both atria. She developed sudden cardiovascular collapse following drainage of pericardial effusion to which she succumbed in spite of vigorous resuscitation. We suggest that the patients with cardiac tamponade complicated by aortic dissection must receive direct aortic repair together with intraoperative pericardial drainage. Selective or single pericardiocentesis should better be avoided.

Acute Disease↗

Successful living-related renal transplantation in a 2-year-old girl weighing less than 10 kilograms.

The success of renal transplantation for infants weighing less than 10 kg is very limited because of graft thrombosis. We report a successful living-related renal transplant in a 2-year-old girl weighing 9.5 kg. Chronic renal failure was diagnosed 1 month before the transplantation. Laparoscopic donor nephrectomy was performed to retrieve the left kidney of her father, a 36-year-old man weighing 70 kg, and the recipient operation was conducted via a right retroperitoneal approach. The right native kidney of the recipient was removed to accommodate the graft kidney during the transplant surgery. The graft renal artery, renal vein, and ureter were anastomosed to the recipient abdominal aorta, inferior vena cava, and bladder, respectively. The abdominal fascial defect was closed with absorbable mesh grafting, and the skin was closed primarily. With intensive fluid therapy and monitoring after reperfusion of the graft kidney, the patient recovered uneventfully and was discharged with an FK506-based immunosuppressive regimen 2 weeks after the operation. Renal function was good, and serum creatinine was 0.5 mg/dL 6 months after the operation.

Body Weight↗