On the ECG, ST segment elevation in at least two contiguous precordial
chest leads with either ST segment elevation >0.
Acute myocardial infarction with isolated ST-segment elevationinposterior
chest leads V7-V9.
The
chest leads of electrocardiogram (ECG) should be reversed but not the limb leads if not the ECG tracings can erroneously display readings of intraoperative myocardial ischemia.
1 mV) in other contiguous
chest leads or the limb leads.
Respiration rate, or the number of breaths per minute, is infrequently measured outside of healthcare settings because it typically requires manual counting of breaths with a timer and then multiplying to convert to a per minute rate or
chest leads or straps that are not convenient to use.
Progressively larger QRS complexes in standard
chest leads [V.
In this series of 15-lead ECG taken from 50 IWMI patients, the overall incidence of ST elevation in the posterior
chest leads (V7-V9) was 26%.
Studies have shown that posterior
chest leads improved the diagnostic accuracy of the ECG for the detection of posterior myocardial infarction (MI) 14, 15.
Her examination showed pulse:97/min; BP: 135/81mmHg; RR:20/min; SpO2:89-92% with FiO2 at 2L/min; ECG showed normal sinus rhythm with tachycardia, T-wave inversions in lead III and V1, strain pattern in anterior
chest leads, right ventricular hypertrophy; Clubbing in both hands, mild peripheral and central cyanosis with pale complexion.
The 80-lead system includes a single-use disposable vest with 64 embedded anterior and 16 posterior
chest leads, along with a computer that enables physicians to view the data as integrated three-dimensional color maps.
Included in this system are the four limb leads and one or two
chest leads (see Figure 7).
On review, the preoperative ECG showed significant ST segment elevation in
chest leads which was missed by our 3-lead ECG monitor.
