Some misplacements, such as arm lead reversal or both electrodes of a bipolar lead on the legs resulting in miniscule P, QRS, and T voltage in that lead, are easy to recognize, as are gross chest lead
misplacements, such as placing the [V.
This lead configuration allows monitoring of leads I, II, and III, or a modified chest lead
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.
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.
On review, the preoperative ECG showed significant ST segment elevation in chest leads
which was missed by our 3-lead ECG monitor.
Electrocardiography on admission revealed marked positive U waves in V1-V3 chest leads
on electrocardiography (Fig.