S4

(redirected from S-4)
Also found in: Acronyms.

S4

Symbol for fourth heart sound.

S4

1. Fourth heart sound, which corresponds to atrial contraction during presystole; it is rarely heard in normal hearts.

S4

Abbreviation for fourth heart sound.
References in periodicals archive ?
Company commanders and their executive officers (XOs) must then work with the battalion S-4 to coordinate movement of additional unit equipment.
Luna expects to file an amendment to the Form S-4 in March 2015, and following the effectiveness of the Form S-4, Luna and Advanced Photonix will mail the joint proxy statement/prospectus included in the Form S-4 to their stockholders for consideration at their respective stockholder meetings.
Even though we were not directly involved in combat patrols, each day brought new challenges and requirements to the S-4 section.
Although the 130th operated and maintained a Class IV yard in support of brigade construction missions, the S-4 section didn't resource all projects due to limited personnel and resources.
Output from the logistics synchronization meeting is meant to provide the battalion S-4 with accurate data to properly analyze the supported unit's logistics requirements.
For those units who don't use SPBS-R or ULLS S-4, LOGSA offers several options:
In conjunction, the company said it has no immediate plans to raise capital under the universal shelf on Form S-3 or to utilise the shelf Form S-4 for an acquisition transaction.
US-based fertiliser maker CF Industries Holdings, Inc.'s (NYSE: CF) has filed with the US Securities and Exchange Commission of a registration statement on form S-4 containing a preliminary proxy statement/shareholder circular/prospectus in connection with its agreed deal to acquire Dutch fertiliser maker OCI N.V.'s (NYSE Euronext: OCI) European, North American and Global Distribution businesses in a transaction valued at approximately USD 8bn, the company said.
Western Refining (NYSE:WNR) disclosed on Monday that its Registration Statement on Form S-4 filed in connection with the planned merger of Northern Tier Energy LP (NYSE:NTI) was declared effective by the Securities and Exchange Commission (SEC) on 23 May 2016.