What is hypertrophy on ECG?

Left ventricular hypertrophy can be diagnosed on ECG with good specificity. When the myocardium is hypertrophied, there is a larger mass of myocardium for electrical activation to pass through; thus the amplitude of the QRS complex, representing ventricular depolarization, is increased.

What is biventricular hypertrophy?

Hypertrophy of both left and right ventricles. The ECG has a low sensitivity for the diagnosis of biventricular hypertrophy (BVH), as the opposing left and right ventricular forces tend to cancel each other out.

How is left ventricular hypertrophy diagnosed on ECG?

The most commonly used ECG criteria to diagnosed left ventricular hypertrophy (LVH) is below: Cornell criteria: Add the R wave in aVL and the S wave in V3. If the sum is > 28 mm in males or > 20 mm in females, then LVH is present. Modified Cornell Criteria: Examine the R wave in aVL.

What is secondary repolarization abnormality?

The secondary repolarization changes were characterized by prolonged QT interval, accompanied by pronounced QRS changes, including increased maximum spatial QRS vector magnitude, prolonged QRS duration, QRS morphology consistent with intraventricular conduction delay, lower values of the T/QRS duration ratio, increased …

What is concentric cardiac hypertrophy?

Concentric left ventricular hypertrophy is an abnormal increase in left ventricular myocardial mass caused by chronically increased workload on the heart, most commonly resulting from pressure overload-induced by arteriolar vasoconstriction as occurs in, chronic hypertension or aortic stenosis.

How do you determine right ventricular hypertrophy on ECG?

RVH is diagnosed on ECG in the presence of a R/S ratio of greater than 1 in lead V1 in the absence of other causes, or if the R wave in lead V1 is greater than 7 millimeters tall. The strain pattern occurs when the right ventricular wall is quite thick, and the pressure is high, as well.

What is a biventricular pacemaker used for?

Cardiac resynchronization therapy (CRT), also called biventricular pacing, uses a special kind of pacemaker — a biventricular pacemaker — that is designed to help the ventricles contract more normally. It keeps the right and left ventricles pumping together by sending small electrical impulses through the leads.

What is biventricular heart failure?

Biventricular heart failure: In biventricular heart failure, both sides of the heart are affected. This can cause the same symptoms as both left-sided and right-sided heart failure, such as shortness of breath and a build-up of fluid.

What are the symptoms of left ventricular hypertrophy?

What are the symptoms of LVH?

  • Shortness of breath.
  • Fatigue.
  • Chest pain (especially with exercise)
  • Heart palpitations.
  • Dizziness or fainting.

What does thickening of the left ventricle mean?

Left ventricular hypertrophy is enlargement and thickening (hypertrophy) of the walls of your heart’s main pumping chamber (left ventricle). The thickened heart wall loses elasticity, leading to increased pressure to allow the heart to fill its pumping chamber to send blood to the rest of the body.

What causes abnormal repolarization?

Repolarization abnormalities typically evolve as a consequence of impaired function of outward K+ currents in cardiac myocytes, which may be caused by genetic defects or result from various acquired pathophysiological conditions, including electrical remodelling in cardiac disease, ion channel modulation by clinically …

Why is ECG abnormal?

An abnormal ECG can mean many things. Sometimes an ECG abnormality is a normal variation of a heart’s rhythm, which does not affect your health. Other times, an abnormal ECG can signal a medical emergency, such as a myocardial infarction /heart attack or a dangerous arrhythmia.