There has always been a question about what transmits electromagnetic waves and/or gravitational forces. Furthermore, the nature of dark matter and dark energy remains elusive. This paper is introducing a new simple theory that may explain many unexplained phenomena in physics. This theory should stimulate many physicists and mathematicians for a new way of thinking about our universe and unsolved mysteries in physics. In this theory, the presence of new particles in the universe called "Spacetime or Gravilon (Gravi for gravity and L for light and on for transmission)", are proposed as the replacement for the space time fabric / field described by Einstein. The fact that gravity and light have the same speed for their propagation can be explained by the presence of Spacetime particles as they utilize the same vehicle (Spacetime particles) for their effect. The presence of Spacetime particles in the universe may explain the unknown phenomena called dark matter. The maximal possible contraction of time particles between space particles can explain why light or any matter cannot surpass the maximal speed of light and why time nearly stops with the light speed. These particles are simplified in this paper but are most likely complicated structures that could have more dimensions than the known four dimensional space time and could be very diverse in nature with multiple subunits than simple illustration in this paper. However, in the core, these particles are made from two fundamental parts. One part contains space particles connected to each other via other part time particles. Time particles could have particle quality but could also be pure energy. Basically, these Gravilon particles introduced in this paper have two major components. One is space and the other one is time. Space particles connected to the time particles could explain Spacetime effect known in the relativity theory. The main difference between this theory and the Einstein relativity, is the fact that this theory is introducing Spacetime particles instead of Space-time fabric. Connection of space with time particles can also explain relativity. Furthermore, interaction of these particles with matter can give matters their masses as an explanation for why matter has mass. Higgs bosons and fields could be also a part of Spacetime particles. This simple theory could also explain limitations of light speed and why light and gravity have the same speed for their effect. Furthermore, probably the distance between Spacetime particles can be stretched or contracted to fit small propagating particles in between based on their sizes. However, these stretching, and contraction properties should have limits. Those particles that can fit between the Spacetime particles before reaching the maximal stretching capability of Spacetime particles will behave mostly as quanta following quantum mechanics rules. Once propagating particles are too

SARS-CoV2 virus, COVID-19, was first reported in Wuhan, China in 2019. The most common symptoms of COVID-19 are dry cough, fever, and diarrhea that occur within 2-14 days of exposure. Primary infection from COVID-19 develops in the respiratory tract. Cardiovascular disease has become a more prominent manifestation of COVID-19 infection however very little is known regarding the impact of COVID-19 on the cardiac conduction system. We present a young patient with COVID-19 who developed a permanent third-degree Atrioventricular (AV) heart block. This report is the first documentation of COVID-19 induced permanent third-degree heart block in a young male.

Objective There are some suggestions that global myocardial strain (GLS) early after ST-elevation myocardial infarction (STEMI) is a predictor of improvement in left ventricular ejection fraction (LVEF) after myocardial infarction. The goal of this study was to evaluate predictive value of GLS in patient with STEMI. Methods The study population consists of 43 patients with acute STEMI and no history of prior coronary intervention treated with primary percutaneous coronary intervention. LVEF and myocardial strain indices were measured 48hours and two months after STEMI by transthoracic echocardiography and speckle tracking method. More than 5% improvement in LV EF was considered significant improvement. Results GLS values were significantly higher in patients with >5% improvement in LVEF 2 months after the STEMI (GLS=15.76% in patients with >5% improvement vs. 11.54% in the other group,P <0.05). ROC analysis suggested GLS values more than 13.5 to be a predictor of significant LVEF improvement 2 month after STEMI. Higher GLS was observed in patients with inferior, posterior and inferoseptal STEMI versus anterior, extensive or anteroseptal STEMI and in patients with right coronary occlusion versus occlusion of the left anterior descending or circumflex arteries. Conclusion We have observed that early longitudinal LV strain after STEMI is a predictor of during first 2 months after STEMI. This is a useful method to predict early LV recovery after STEMI. GLS values more than 13.5%is a significant predictor of significant LVEF improvement.