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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|thumb|Dr Surawicz, still active in November 2006, at age 89.]]
[[Image:Surawicz.jpg|100px|thumb|left|Dr Surawicz, still active in November 2006, at age 89.]]
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:


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