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Peaked T waves refers to the pointed, tall, peaked shape of [[T waves]] on the EKG in the setting of certain abnormalities such as [[hyperkalemia]].
Peaked T waves refers to the pointed, tall, peaked shape of [[T waves]] on the EKG in the setting of certain abnormalities such as [[hyperkalemia]].


==Causes==
==Differential Diagnosis==
* Differential diagnosis of this EKG change includes the T wave changes of [[bradycardia]] or [[stroke]].
* Prominent [[U wave]]s and [[QTc]] prolongation are more consistent with [[stroke]] than hyperkalemia.
 
==Diagnosis==
* Earliest sign of hyperkalemia
* Earliest sign of hyperkalemia
* Occurs with K > 5.5 meq/li
* Occurs with K > 5.5 meq/li
* Differential diagnosis of this EKG change includes the T wave changes of [[bradycardia]] or [[stroke]].
* Prominent [[U wave]]s and [[QTc]] prolongation are more consistent with [[stroke]] than hyperkalemia.


==Electrocardiographic Examples==
==Electrocardiographic Examples==
{|
Shown below is the progression of [[T wave]] changes in hyperkalemia:
Progression of T wave changes in hyperkalemia
[[Image:Hyperkalemia2.jpg|500px|Peaked T waves]]
|[[Image:Hyperkalemia2.jpg|500px|Peaked T waves]]
 
|-
Shown below is an EKG showing peaked T waves in the lateral leads:
Peaked T waves
[[Image:Hyperkalemia1.jpg|500px|Peaked T waves]]
|[[Image:Hyperkalemia1.jpg|500px|Peaked T waves]]
 
|-
Shown below is an EKG showing symmetric, narrow, peaked T waves in the lateral leads:
Peaked T waves
[[Image:Hyperkalemia.jpg|500px|Tall, symmetric, narrow based T waves in a hyperkalemic patient.]]
|[[Image:Hyperkalemia.jpg|500px|Tall, symmetric, narrow based T waves in a hyperkalemic patient.]]
|}


==References==
==References==

Latest revision as of 01:40, 24 July 2013

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Peaked T waves refers to the pointed, tall, peaked shape of T waves on the EKG in the setting of certain abnormalities such as hyperkalemia.

Differential Diagnosis

  • Differential diagnosis of this EKG change includes the T wave changes of bradycardia or stroke.
  • Prominent U waves and QTc prolongation are more consistent with stroke than hyperkalemia.

Diagnosis

  • Earliest sign of hyperkalemia
  • Occurs with K > 5.5 meq/li

Electrocardiographic Examples

Shown below is the progression of T wave changes in hyperkalemia: Peaked T waves

Shown below is an EKG showing peaked T waves in the lateral leads: Peaked T waves

Shown below is an EKG showing symmetric, narrow, peaked T waves in the lateral leads: Tall, symmetric, narrow based T waves in a hyperkalemic patient.

References