Unrecognized myocardial infarction and the risk of stroke: The Rotterdam Study

OBJECTIVE

To investigate the relationship between unrecognized myocardial infarction and the risk of stroke in a population-based cohort study.

METHODS

We followed 6,439 participants from the Rotterdam Study for stroke until January 2002. Participants were free from stroke, and presence of myocardial infarction was assessed at baseline (1990-1993). We calculated hazard ratios of stroke for persons with unrecognized or recognized myocardial infarction compared with persons without myocardial infarction. Analyses were adjusted for age, sex, and cardiovascular risk factors.

RESULTS

In 52,915 person-years of follow-up, 505 strokes occurred. Recognized myocardial infarction was only borderline associated with an increased risk of stroke. Unrecognized myocardial infarction increased the risk of stroke by 76% (age- and sex-adjusted hazard ratio 1.76, 95% CI 1.31 to 2.37). Stratification by sex showed that the increased risk was only found in men (hazard ratio for men 2.53, 95% CI 1.68 to 3.81; hazard ratio for women 1.27, 95% CI 0.82 to 1.96). After adjusting for cardiovascular risk factors at baseline, the risk remained significantly increased in men (hazard ratio for stroke 2.13, 95% CI 1.35 to 3.36). Subtyping of strokes revealed that unrecognized myocardial infarction was particularly associated with cortical ischemic strokes (hazard ratio for men 3.57, 95% CI 1.79 to 7.12).

CONCLUSIONS

Men with unrecognized myocardial infarction have an increased risk of stroke.

Predisposing factors to industrial hand injuries in Saudi Arabia

A prospective study was performed on 108 consecutive cases of industrial hand injuries in Saudi Arabia to highlight predisposing factors to injury. Traumatic amputations and fractures of the radial three digits were the commonest injuries. Eighty patients (74%) worked for more than 8 hours per day, which is against Saudi labour law. Only 5% of the injured workers had similar jobs previously or formal training prior to employment. The majority (81%) admitted that safety measures were not being followed at the time of injury. Ten workers (9%) had a previous history of industrial hand injury. It was concluded that strict implementation of safety measures and Saudi labour law, proper training of employees, and the development of agencies for the prevention of occupational accidents would be important in the prevention of industrial hand injuries in Saudi Arabia.

Ulnar nerve palsy: a complication following percutaneous fixation of supracondylar fractures of the humerus in children

Four children, who developed ulnar nerve palsy following percutaneous fixation of supracondylar fracture of the humerus by Kirschner wires (K-wires) are reported. In one the K-wire was removed within 48 h and the neuropraxia recovered immediately. In the other three patients recovery took an average of 6 weeks after removal of the wires and only after exploration of the ulnar nerve. The nerve was found to be trapped behind the medial epicondyle of the humerus. Release and subsequent transposition of the nerve resulted in recovery. Certain measures are suggested to prevent this avoidable complication in the treatment of supracondylar fractures of the humerus in children.

Femoral neck fracture: a complication of femoral nailing

A fracture of the shaft of the femur in adults is common after road traffic accidents. Until recently it was not known that a fracture of the femoral neck can occur while fixing the femoral shaft fracture with an intramedullary nail. We report three patients in whom femoral neck fractures occurred during femoral nailing. Fractures of the femoral neck were detected by routine postoperative radiographs of the hip joint. All the three patients were treated non-operatively and the fractures healed without complication. The cause of the femoral neck fracture seems to be forceful use of an awl in the wrong direction or multiple entry points in the trochanteric region which weaken the femoral neck; subsequent hammering of the nail completes the fracture.