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
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
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.