article thumbnail

Torsade in a patient with left bundle branch block: is there a long QT? (And: Left Bundle Pacing).

Dr. Smith's ECG Blog

Heart Rhythm [Internet]. EKG with paced complexes shown below shows much narrower QRS complex and echocardiogram showed improved LV systolic function primarily due to improvement in LV dyssynchrony. (J Bogossian H, Frommeyer G, Ninios I, Hasan F, Nguyen QS, Karosiene Z, Mijic D, Kloppe A, Suleiman H, Bandorski D, et al.

article thumbnail

What is the link between thyroid and heart disease?

All About Cardiovascular System and Disorders

While in low output heart failure the extremities are cold, in high output failure due to increased thyroid function, the extremities of the limbs are warm. Another important issue with increased thyroid function is that the heart rhythm may become irregular.

article thumbnail

Abstract 4115027: Transcutaneous phototherapy improves left ventricular systolic function

Circulation

Background:The emerging field of cardiac optogenetics uses pulses of light to stimulate optically-sensitive proteins in the heart, influencing cellular physiology with unprecedented spatiotemporal resolution. Potential benefits may include heart rhythm stabilization and relief from congestive heart failure (CHF).

article thumbnail

Paced QRS morphology mimicking complete left bundle branch block induced by right ventricular pacing is associated with pacing?induced cardiomyopathy

Journal of Cardiovascular Electrophysiology

Complete left bundle branch block (CLBBB)-like QRS morphology of right ventricular pacing at pacemaker implantation satisfying the American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society criteria of CLBBB was associated with development of pacing induced cardiomyopathy.

article thumbnail

WHAT EXACTLY IS AN ARRHYTHMIA?

Dr. Sanjay Gupta

So arrhythmia literally means absence or loss of rhythm. A cardiac arrhythmia therefore means loss of cardiac rhythm. It is however used in medical practice as a description for disturbance rather than absence of heart rhythm. Definitive treatment of a dysrhythmia is only possible after it has been caught on an ECG.

article thumbnail

What do heart tests tell us?

Dr. Sanjay Gupta

So today i wanted to talk to you about what each heart test tells us about these different aspects of heart disease Tests that tell you about the heart as a pump The most commonly used test to assess the heart as a pump is an echocardiogram. A simple standard 12 lead ECG can be helpful.

article thumbnail

Precordial ST depression. What is the diagnosis?

Dr. Smith's ECG Blog

Seventh , an immediate echocardiogram can make the distinction. Sixth , placement of posterior leads (take leads V4-V6 and place them at the level of the tip of the scapula, with V4 placed at the posterior axillary line ("V7"), V6 at paraspinal area ("V9"), and V5 ("V8") between them. At lease 0.5 Circulation 2007;115(10):1306-24.

STEMI 52