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ST Morphology: Difference between revisions
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[[Image:normal_ST_elevation.png|thumb|300px|Examples of normal ST elevation]] | [[Image:normal_ST_elevation.png|thumb|300px|Examples of normal ST elevation]] | ||
[[Image:pathologic_ST_elevation.png|thumb|300px|Examples of pathologic ST elevation. [[LVH]], [[LBBB]], [[Pericarditis]], [[Hyperkalemia]], [[Anterior AMI]] ]] | [[Image:pathologic_ST_elevation.png|thumb|300px|Examples of pathologic ST elevation. [[LVH]], [[LBBB]], [[Pericarditis]], [[Hyperkalemia]], [[Anterior AMI]] ]] | ||
The most important cause of '''ST elevation''' is '''acute [[Ischemia]]'''. Other causes are <cite>Wang</cite><cite>Werf</cite>: | The most important cause of '''ST segment elevation''' is '''acute [[Ischemia]]'''. Other causes are <cite>Wang</cite><cite>Werf</cite>: | ||
*Early repolarization | *Early repolarization | ||
*[[Clinical Disorders#Pericarditis|Acute pericarditis]]: ST elevation in all leads except aVR | *[[Clinical Disorders#Pericarditis|Acute pericarditis]]: ST elevation in all leads except aVR | ||
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*[[Idioventricular Rhythm|Idioventricular rhythm]] including [[Pacemaker|paced rhythm]] | *[[Idioventricular Rhythm|Idioventricular rhythm]] including [[Pacemaker|paced rhythm]] | ||
In a study by Otto et al. among 123 patients with chest pain and ST segment elevation of >1mm 63 patients did not have a myocardial infarction. Diagnoses in patients who did not have a myocardial infarction were [[LVH]] (33%) and [[LBBB]] (21%). <cite>Otto</cite> In daily practice this means that in these patients the diagnosis of myocardial infarction has to depend on other diagnostic means, such as laboratory tests, echocardiography and coronary angiography. | In a study by Otto et al., among 123 patients with chest pain and ST segment elevation of >1mm, 63 patients did not have a myocardial infarction. Diagnoses in patients who did not have a myocardial infarction were [[LVH]] (33%) and [[LBBB]] (21%). <cite>Otto</cite> In daily practice this means that in these patients the diagnosis of myocardial infarction has to depend on other diagnostic means, such as laboratory tests, echocardiography and coronary angiography. | ||
An important clue for the diagnosis of ischemia is the presence of [[Ischemia|reciprocal ST segment depression]]. | An important clue for the diagnosis of ischemia is the presence of [[Ischemia|reciprocal ST segment depression]]. | ||