Transmitral inflow wave and progression from paroxysmal to permanent atrial fibrillation in Asian people

Takashi Nakagawa1,2, Hisao Hara1, Masaya Yamamoto1

  • 1Department of Cardiology, National Center for Global Health and Medicine, Tokyo, Japan.

Heart Asia
|July 20, 2019
PubMed

Insights

Lower peak A velocity in transmitral inflow waves can predict the progression of paroxysmal atrial fibrillation to permanent atrial fibrillation. This finding may aid in early intervention for patients at risk.

Area of Science:

  • Cardiology
  • Echocardiography
  • Atrial Fibrillation Research

Background:

  • Paroxysmal atrial fibrillation (PAF) can advance to permanent atrial fibrillation (AF).
  • Predictive markers for PAF progression are crucial for timely clinical management.
  • The role of transmitral inflow waves in predicting this progression remains unclear.

Purpose of the Study:

  • To investigate the association between transmitral inflow waves and the progression of PAF to permanent AF.
  • To determine if specific echocardiographic parameters can predict AF progression.

Main Methods:

  • Retrospective analysis of clinical and echocardiographic data from 88 patients with PAF.
  • Exclusion of patients with structural heart disease, significant valvular disease, cardiomyopathy, cardiac device, or LVEF <50%.

Main Results:

  • Patients who progressed to permanent AF were more likely to be male.
  • Lower peak A velocity was observed in patients progressing to permanent AF.
  • After covariate adjustment, lower peak A velocity independently predicted progression to permanent AF (p=0.025).

Conclusions:

  • Peak A velocity of transmitral inflow waves may serve as a useful predictor for PAF progression.
  • This finding is particularly relevant for predicting progression in Asian populations.
  • Echocardiographic assessment of transmitral inflow waves could enhance risk stratification for AF progression.
Abstract

Related Concept Videos

Amyloid Fibrils03:03

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
Amyloid deposits were observed as early as 1639 in the liver and the spleen.   In 1854, Rudolph Virchow performed iodine staining,...
11.7K
Amyloid Fibrils03:03

Amyloid Fibrils

6.3K
The Wave Nature of Light02:12

The Wave Nature of Light

The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
60.9K
Fibril-associated Collagen01:11

Fibril-associated Collagen

Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
3.2K
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
7.2K
Half wave rectifier01:20

Half wave rectifier

A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
2.4K