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→Correct measurement of the QT interval: how to measure the end of the T wave
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===Correct measurement of the QT interval: how to measure the end of the T wave=== | ===Correct measurement of the QT interval: how to measure the end of the T wave=== | ||
[[Image:Surawicz.jpg|100px| Dr Surawicz, is one of the inventors of the tangent mehod<cite>Lepeschkin</cite>. This picture was taken in November 2006, when he was 89 years old and still active.]] | [[Image:Surawicz.jpg|100px|thumb|Dr Surawicz, is one of the inventors of the tangent mehod<cite>Lepeschkin</cite>. This picture was taken in November 2006, when he was 89 years old and still active.]] | ||
Although QT prolongation is potentially lethal, measurement of the QT interval by physicians is poor as different definitions of the end of the T wave exist.<cite>Viskin</cite> Most QT experts define the end of the T wave as the intersection of the steepest tangent line from the end of the T-wave with the base line of the ECG.<cite>Lepeschkin</cite> This leads to the following stepwise approach: | Although QT prolongation is potentially lethal, measurement of the QT interval by physicians is poor as different definitions of the end of the T wave exist.<cite>Viskin</cite> Most QT experts define the end of the T wave as the intersection of the steepest tangent line from the end of the T-wave with the base line of the ECG.<cite>Lepeschkin</cite> This leads to the following stepwise approach: | ||