Ebook The only EKG book you’ll ever need (9/E): Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook The only EKG book you’ll ever need (9/E): Part 2
Ebook The only EKG book you’ll ever need (9/E): Part 2
5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2hat happens when electrical current is conducted to the ' ventricles more rapidly than usual2what an accessory pathway isthat Wolff-Parkinson-White is not the name of a law firm4why accessory pathways predispose to arrhythmias5about the case of Winston T., a preexcitable personalityIWhat Is Preexcit Ebook The only EKG book you’ll ever need (9/E): Part 2ation?In the last chapter, we discussed what happens when conduction from the atria to the ventricles is delayed or blocked. This chapter presents theEbook The only EKG book you’ll ever need (9/E): Part 2
other side of the coin: what happens when the electrical current is conducted to the ventricles more quickly them usual.How can such a thing happen?W5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2held up for about 0.1 second, long enough for the atria to contract and empty their content of circulating blood into the ventricles. In the preexcitation syndromes, there are accessory pathways by which the current can bypass the AV node and thus arrive at the ventricles without the delay and often Ebook The only EKG book you’ll ever need (9/E): Part 2 ahead of time.A number of different accessory pathways have been discovered. Probably fewer than 1% of individuals possess one of these pathways. TheEbook The only EKG book you’ll ever need (9/E): Part 2
re is a decided male preponderance. Accessory pathways may occur in normal healthy hearts as an isolated finding, or they may occur in conjunction wit5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2White (WPW). It is easily diagnosed on the EKG. In wpw, the accessory conductionpathway acts as a short circuit, allowing the atrial wave of depolarization to bypass the AV node and activate the ventricles prematurely.Wolff-Parkinson-WhiteIn wpw, the bypass pathway is a discrete aberrant conducting Ebook The only EKG book you’ll ever need (9/E): Part 2pathway that connects the atria and ventricles. It can be left sided (connecting the left atrium and left ventricle) or right sided (connecting the riEbook The only EKG book you’ll ever need (9/E): Part 2
ght atrium and right ventricle).Premature ventricular depolarization through the accessory pathway causes two things to happen on the EKG:1The PR inte5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2or diagnosis is a PR interval less than 0.12 seconds.2The QRS complex is widened to more than 0.1 second by the presence of what is called a delta wave. Unlike bundle branch block, in which the QRS complex is widened because of delayed ventricular activation, in wpw it is widened because of prematur Ebook The only EKG book you’ll ever need (9/E): Part 2e activation. The QRS complex in WPW actually represents a combination beat: most of the ventricular myocardium is activated through the normal conducEbook The only EKG book you’ll ever need (9/E): Part 2
tion pathways, but a small region is depolarized early through the accessory pathway. This small region of myocardium that is depolarized early gives 5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2KG.Bundle of kentDelta waveDelta waveWolff-Parkinson-White (WPW). Current IS held up by the normal delay at the AV node but races unimpeded down the accessory pathway. The EKG shows the short PR interval and delta wave.A Short PR Interval Without a Delta WaveEven more common than wpw is the presence Ebook The only EKG book you’ll ever need (9/E): Part 2 of a short PR interval without an accompanying delta wave. No single anatomic pathway has been consistently identified to explain this finding, and iEbook The only EKG book you’ll ever need (9/E): Part 2
t is probably the result of a variety of structural abnormalities. Some patients may have a small bypass pathway within or very close to the AV node. 5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh Ebook The only EKG book you’ll ever need (9/E): Part 2reexcitation?In many individuals with wpw, preexcitation poses few, if any, clinical problems. However, preexcitation does predispose to various tachyarrhythmias. It is estimated that 50% to 70% of individuals with wpw experience at least one supraventricular arrhythmia. These patients may then deve Ebook The only EKG book you’ll ever need (9/E): Part 2lop symptoms such as palpitations, shortness of breath, and so on. The presence of both the classic5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i wh5Preexcitation Syndromesth Point For additional ancillary materials related to this chapter, please visit thePoint.In this chapter you will learn:i whGọi ngay
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