CARDIOLOGY
Cardiologist Dr. Bernstein recently told me, “Pharmacologic stress testing doesn’t cause ischemia, and can be done to patients right after an MI.” The American Academy of Nuclear Cardiology says, “Adenosine generally does not cause myocardial...
CARDIOLOGY, ECG
ECG Tips from an Indian Physician The Eyeball Technique: 10 Rules for rapid ECG Reading. Heart Rate: 3 to 5 rule & big box rule P wave: Lead II taller than I AV Conduction 1: > one large square rule AV Conduction 2: Who is related to whom? QRS duration: Little...
CARDIOLOGY, ECG
In sinus arrhythmia, the rate usually gradually slows and then gradually speeds up. This is due to breathing and the effects of the sympathetic and parasympathetic system. In sinus arrhythmia, there is a normal, extremely minimal increase in HR during inspiration and...
CARDIOLOGY, ECG
An ECG machine is a voltmeter (galvanometer). It is used to record the electrical impulses that stimulate the heart. The electrodes record a potential difference. The needle (or pen) of the ECG is deflected a given distance depending on the voltage measured. The ECG...
CARDIOLOGY, ECG
Location of Ischemia or Infarction. The ECG can be used to localize the MI, and sometimes, even predict the infarcted artery. MI Localization by Ed Burns of Life in the Fast Lane. See here. Check out this schematic at LITFL. It breaks down MI localization according to...
CARDIOLOGY, ECG
E.g. The PR segment vs. the PR interval. Segment A segment in an ECG is the region between two waves. PR segment starts at the end of the P wave and ends at the start of the QRS complex. The ST segment starts at the end of the QRS wave and ends at the start of the T...
