It is often less extensive than heart attacks showing q waves.

Pathological Q waves may appear within hours or may take greater than 24 hr.

Normal Q waves, when present, represent depolarization of the interventricular septum.

A Q wave is any downward deflection after the P wave.

Myocardial infarction (history or Q waves)

A recent study from Boston suggests that these patients have a better immediate prognosis than people with Q wave infarction, but a worse prognosis later.

It has also been suggested that complex ventricular arrhythmias carry a worse prognosis in patients with non Q wave infarcts.

In addition, on ECG, ST elevation and Q waves are seen.

ECG criteria New, significant Q waves or equivalents 0.04 s in at least two contiguous leads.

Few infarctions based on new Q waves without clinical evidence of reinfarction were identified by the CEC and not by site investigators.

They may include QT prolongation, Q waves, cardiac dysrhythmias and ST elevation that mimics a heart attack.

"Nuts," said somebody else, as MacDonald poured grain alcohol carefully into the glass and filled it with orange juice, "the only really logical medium is Q waves."

Excepted indications include early post infarction angina with or without ST changes, non Q wave infarcts and patients with a positive predischarge stress test.

For this reason, they are referred to as septal Q waves and can be appreciated in the lateral leads I, aVL, V5 and V6.

"Transient pathological Q waves in suspected acute myocardial infarction: 'electrical stunning'" in International Journal of Clinical Practice: 2000.

Pathologic Q waves occur when the electrical signal passes through stunned or scarred myocardium; as such, they are usually markers of previous myocardial infarcations, with subsequent fibrosis.

Long term changes of ECG include persistent Q waves (in 90% of cases) and persistent inverted T waves.

On November 27, 1981 Ary L. Goldberger agreed that the vectorial theory is more flexible than the cavity potential explanation to Q waves [5].

According to these, a cardiac troponin rise accompanied by either typical symptoms, pathological Q waves, ST elevation or depression or coronary intervention are diagnostic of myocardial infarction.

In seismology, Love waves (also known as Q waves (Quer: German for lateral)) are surface seismic waves that cause horizontal shifting of the Earth during an earthquake.

In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle.

At least 10% of patients with STEMI do not develop myocardial necrosis (as evidenced by a rise in cardiac markers) and subsequent Q waves on EKG after reperfusion therapy.

His dissertation for the degree of M.D. was titled 'A comparative study of clinical, biochemical, electrocardiographic and echocardiographic parameters in hospital in-patients with Q wave and non Q wave myocardial infarction'.

It is important not to call LAFB in the setting of a prior inferior wall myocardial infarction which may also demonstrate left axis deviation due to the initial forces (Q wave in a Qr complex) in leads II, III, and aVF.