Electrocardiogram and left atrial abnormality: Design of an observational study to clarify diagnostic criteria

[摘要] This article presents a model of queuing system for broadband multimedia educational resources, as well as a model of access to a hybrid cloud system storage. These models are used to enhance the efficiency of computing resources in a distance learning system. An additional OpenStack control module has been developed to achieve the distribution of request streams and balance the load between cloud nodes.

[关键词] electrocardiogram;interatrial block;left atrial abnormality;speckle tracking echocardiography