Ablation of atrial fibrillation: localizing triggers, mapping systems and ablation techniques.

Ablation to eliminate atrial fibrillation (AF) is a therapy in evolution. Approaches to the ablation appear to be currently divided into 2 major strategies anatomic versus electrically guided. In addition in using an electrically guided techniques debate remains whether a targeted approach should be used, whether exit block should be documented, and whether all non pulmonary vein triggers should be targeted. This review highlights the different ablation strategies and identifies a systematic approach to ablation of pulmonary and non pulmonary vein triggers that we have adapted at our institution. The role of intracardiac echo, trigger provocation and localization and the use of 3-D mapping systems in AF ablation are defined.

Thumb collateral ligament injuries. An anatomic basis for treatment.

This anatomic and clinical study leads to the following conclusions: 1. The ulnar and radial proper collateral ligaments are the critical lateral stabilizers of the thumb MP joint; both are highly vulnerable to complete disruption, with resultant disabling joint instability. 2. The intrinsic anatomy of the radial side of the MP joint is not a mirror image of the ulnar aspect. Significant anatomic differences account for distinctive patterns of instability. Whereas disruption of the ulnar collateral ligament in conjunction with dorsal capsular tears is apt to result in combined radiovolar subluxation, disruption of the radial collateral ligament, coupled with the unopposed dynamic force of the adductor pollicis, characteristically is prone to a rapid pathologic sequence of profound joint instability, with progressive ulnar and volar subluxation and, ultimately, degenerative joint disease. 3. Optimal management of the complete collateral ligament lesion requires prompt diagnosis, most accurately confirmed with physical and radiographic stress testing, and precise surgical repair. Immobilization alone is insufficient treatment for these serious ligament disruptions, characterized by considerable displacement with wide separation of torn ends. 4. Although early direct repair affords the best opportunity for restoration of joint integrity with a highly favorable functional recovery, secondary repair and free tendon grafting, prior to joint deformity, provide consistently successful options for chronic instability.

Surgical management of the hand in scleroderma.

Disabling deformity of the hand is a hallmark feature of the person afflicted with scleroderma. However, existing literature provides little guidance to operative treatment for the wide spectrum of hand derangement. Although arthrodesis is generally recommended for severe flexion contractures of the interphalangeal joints, other surgical procedures such as arthroplasty, excision of painful calcinosis, and digital sympathectomy have been employed sparingly, undoubtedly due to potentially hazardous soft tissue conditions. Based on experience with 70 scleroderma patients requiring 272 hand operations, this article provides further insight as to the role of surgical treatment for the scleroderma hand. The favorable results in this relatively large series of cases support the efficacy of precisely timed and skillfully executed surgery in the alleviation of pain, prevention of tissue loss, preservation of function, and improvement in aesthetics. For the ischemic tissues of the scleroderma hand the prerequisite for uncomplicated surgery is a tension-free wound, often requiring judicious skeletal shortening and healing by secondary intention.

Clinical examination of the distal ulna and surrounding structures.

A complete understand of the anatomy of the ulnar aspect of the wrist and the potential pathologies that may afflict it is the key to making an accurate diagnosis, ordering appropriate ancillary studies, and providing comprehensive patient management for problems in the region. This article focuses on the clinical examination of the skeletal, articular, and soft-tissue components about the distal ulna. Differentiation of distal ulnar maladies from more proximal conditions producing ulnar wrist symptoms is also reviewed.