Related Experiment Video
Updated: Aug 10, 2026

Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
Published on: June 25, 2016
[How much harm can be caused by a badly recorded or badly interpreted ECG! (author's transl)]
Abstract:
Two cases are presented which support the sentence of the title. In a 38 years old man a life insurance company proposed an extra charge on the basis of a pseudoischemic ECG due to exceeding pressure of the writing pen on the ECG paper. In a 28 years old asymptomatic female an abnormal ECG was interpreted as due to ischemic heart disease. Physical activity was restricted and three pregnancies were interrupted. 18 years later an angiography showed normal coronary vessels. Some months later an echocardiogram showed an abnormal pericardial pattern, giving a possible explanation for the abnormal ECG.
Related Concept Videos
Errors occurring during blood pressure monitoring
Several factors...
Instrumentation Amplifier
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
Electrocardiogram
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Electrocardiogram Fundamentals
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin to...
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism, and...

