Marco Casario used to program games in Basic for Commodore 64 before dedicating himself to Flash and Director projects for the Web. He is also an Adobe Certified Expert in Flex 3 and AIR. Garth works with CakePHP and JavaScript, and continues to improve his design skills. He has been developing internet applications since 2004, and is the founder of VegasFlex, an official Adobe Flex User Group for the Greater Las Vegas Area, focusing on Flex, AIR, and Flash Catalyst. Garth Braithwaite is an Interactive Engineer and Consultant for Media Blacksmith, a company he formed with a partner in 2007. Todd Anderson is a Senior Software Developer in the Multimedia Platforms Group at Schematic Boston, and a co-author of "Adobe Air: Create - Modify - Reuse" (Wrox/Wiley). He works extensively with the tools discussed in this book, and teaches about their use in workshops and at colleges. Josh Noble, a consultant, freelance developer, and Rich Internet Application designer, has taught coding and electronics to art and design students at the School of the Museum of Fine Arts in Boston. Validation, formatting, and regular expressions.It's a great way to jumpstart your next web application. You'll get results fast, whether you're a committed Flex developer or still evaluating the technology. Each recipe provides an explanation of how and why it works, and includes sample code that you can use immediately. You'll find answers to hundreds of common problems you may encounter when using Adobe Flex, Flex 4 Framework, or Flash Builder, Adobe's GUI-based development tool.įlex 4 Cookbook has hands-on recipes for everything from Flex basics to solutions for working with visual components and data access, as well as tips on application development, unit testing, and Adobe AIR. Since Leads II and III are obviously affected by the artifact, which makes the left leg the culprit electrode.With this collection of proven recipes, you have the ideal problem-solving guide for developing interactive Rich Internet Applications on the Adobe Flash Platform. Lead II is derived from the left leg and the right arm, and Lead III is derived from the left leg and the left arm. Lead I is derived from the left and right arm electrodes. We can see that Lead I is unaffected by the baseline artifact. Knowing which limb electrodes are used for each limb lead will lead you, in this case, to the faulty electrode, which may simply be loose. This ECG offers a chance to illustrate to your students why they should understand how each lead is derived. The most preventable one is poor lead placement. Poor R wave progression can have many causes. So, V1 should be mostly negatively deflected, and V6 should be nearly all positive, with a gradual transition across the chest leads. The R waves should get more prominent as we move across the chest toward V6, while the s waves become less prominent. They should all have an RS pattern, with V1 having a small r wave and a large S wave. The precordial leads show poor R wave progression. Even though it is not premature, it could be presumed to have been conducted aberrantly. The second beat on the ECG appears different from the others, and has a P wave. We would expect to see similar signs in the lateral chest leads, V5 and V6, also. These, along with the high voltage in aVL, suggest left ventricular hypertrophy with strain. We do see abnormal ST segments and T waves in the high lateral leads I and aVL. This ECG has some intriguing abnormal signs, but we should wait for a better tracing before attempting a firm interpretation. Even though we cannot obtain “perfection”, if we settle for sloppiness, it will breed more sloppiness. Teach your students to strive for perfection. When an ECG has obvious signs of artifact, the causes of the artifact should be corrected and the ECG repeated. Such obstacles could be: seizures, tremors, vigorous resuscitation efforts underway, or patient not cooperating. If there are insurmountable obstacles preventing a technically good tracing, the circumstances should be written on the ECG. This ECG is being offered as a teaching aid, to show how artifact can affect our ability to interpret an ECG, and to encourage our students to be meticulous in obtaining a good-quality tracing whenever possible.
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