Assessment of coastal turbidity improvement potential by terrigenous sediment load reduction and its implications on seagrass inhabitable area in Banate Bay, central Philippines.

This paper demonstrates the effects of terrigenous sediment load reduction by watershed managements on coastal turbidity in Banate Bay, Iloilo located in central Philippines, using field observations and numerical simulations. Measurements of the total suspended solid and particulate organic carbon indicated that the bulk component of the coastal turbidity comprised terrigenous mineral particles rather than phytoplankton at the rise of the river after heavy rain. The suspended sediment concentration and underwater light intensity were simulated by an atmosphere-watershed-coastal ocean model to investigate the contribution of the terrigenous sediment load to the coastal turbidity in rainy season. The coastal sediment simulation indicated that the turbidity in Banate Bay is highly impacted by terrigenous sediment inputs from distant watersheds, which are transported to the bay by coastal currents. In contrast, the contributions of sediment loads from the adjacent watersheds to the bay turbidity were limited. The simulation also indicated that the majority of the bay is not inhabitable for seagrasses due to limited light availability caused by the high turbidity. Scenario analysis of the sediment load reduction demonstrated that significant reduction of turbidity and improvement of light penetration are conditionally expected only when the remediation is implemented with cooperative management of a series of neighboring watersheds because of the significant contributions of sediment loads from multiple basins.

Hipovolemia no infarto agudo do miocárdio / Hypovolemia in acute myocardial infarction

Nove pacientes com infarto agudo do miocárdio e sinais de hipoperfusäo periferica foram estudados do ponto de vista clínico e hemodinâmico. Näo apresentavam sinais clínicos e/ou radiológicos de congestäo pulmonar, enquadrados no grupo III da classificaçäo de Forrester e col. Em dois pacientes, a hipovolemia ocorreu por uso de diuréticos e em outro por hemorragia decorrente de rotura de aneurisma da aorta abdominal. Nos demais seis pacientes, näo houve causa aparente e responsável pela hipovolemia. Seis indivíduos morreram, sendo quatro na fase hospitalar. Este estudo mostra que a hipoperfusäo periféricia no infarto agudo do miocárdio constitui síndrome multifatorial da qual fazem parte: pacientes realmente hipovolêmicos que respondem a administraçäo de líquidos, pacientes com infarto de ventrículo direito e pacientes com infarto extenso, alteraçäo estrutural acentuada e prognóstico reservado

Estudo ecocardiográfico em esclerose sistêmica progressiva e lúpus eritematoso sistêmico / Echocardiographic study in progressive systemic sclerosis and systemic lupus erithematosus

Os autores estudam, pela ecocardiografia, 44 pacientes 18 com LES e 26 com esclerose sistêmicas progressiva. Mostram a importância deste método näo invasivo em detectar alteraçöes pericárdicas miocárdicas e endocárdicas, mesmo em pacientes sem quaisquer manfestaçöes aparentes para o lado do aparelho cardiovascular. Acham que o ecocardiograma é um importante método para detectar a cardiopatia esclerodérmica e lúpica, além de sua utilidade no seguimento evolutivo destas colagenoses