¶1OPINION
¶2The plaintiffs have filed a motion for a new trial after a jury returned a verdict in their favor, but only in the amount of $1200. Plaintiff Thomas W. Putney’s
¶3THE FACTS
¶4Mr. Putney and Mr. Rosin owned adjoining business premises on Tatnall Street in Wilmington. On , January 8, 1997, Mr. Putney went into Mr. Rosin’s place of business to air a complaint over the alleged conduct of tenants in Mr. Rosin’s building. Mr. Putney testified that Mr. Rosin became enraged and assaulted him. He testified that Mr. Rosin finished the assault by pushing him out the door, causing him to fall against a parked car and then onto the sidewalk. Mr. Rosin testified that he merely tried to escort Mr. Putney out the door when he wouldn’t leave, and that Mr. Putney planted his feet and then kept a foot in the door so that Mr. Rosin couldn’t close it. He denied that Mr. Putney fell to the sidewalk. Later that day Mr. Putney went to the emergency ward of a local hospital. The emergency department record shows a diagnosis of contusions to the back and foot. After a short time there, he was discharged and sent home.
¶5Mr. Putney had a pre-existing heart condition known as atrial fibrillation, which is an irregular heartbeat. Prior to January 8, 1997, the condition had been asymptomatic for about three years. On January 21, 1997, he went to see his family doctor, Dr. Young, because, according to his testimony, he wasn’t feeling well from the assault. Dr. Young’s notes state “c/e assaulted 01/08/97” and “assaulted by another man in an office.” The records also document that Dr. Young determined, or at least suspected, that Mr. Putney had suffered a new onset of atrial fibrillation. He referred the plaintiff to the doctor who had previously treated his heart condition, Dr. *904Pennock. On January 28 Dr. Pennock conducted a cardiogram which verified that Mr. Putney was experiencing atrial fibrillation. Dr. Pennock’s medical record for that day states that Mr. Putney “was assaulted and he developed a racing heartbeat afterwards where he was seen in the St. Francis Emergency Room.” Dr. Pen-nock was aware that the diagnosis of new atrial fibrillation was being made subsequent to that event. Dr. Pennock, and other doctors, treated Mr. Putney for the condition through approximately July 1997 and continued to see him for follow up through May 2001. Dr. Pennock’s records include an entry made on March 3, 2000 documenting a telephone conversation he had with Mr. Putney’s lawyer on February 2, 2000. The record indicates that the attorney asked him whether, to a reasonable medical probability, the atrial fibrillation could have been precipitated by stress, and that Dr. Pennock said yes.
¶6At trial Mr. Putney contended that his new onset of atrial fibrillation was caused by the alleged assault. His claim was supported by the testimony of his treating physician. The defense case included testimony from another doctor who testified that the post-January 8 atrial fibrillation was caused by other factors unrelated to the encounter between Mr. Putney and Mr. Rosin. He testified that the emergency ward record from Mr. Putney’s visit contained no mention of symptoms such as shortness or breath or irregular heartbeat which he would expect to see if the encounter had caused a new atrial fibrillation. The jury obviously rejected the contention that Mr. Putney’s heart condition was aggravated by the incident and awarded a verdict more commensurate with a bruised foot and/or back which were documented in the emergency room record.
¶7In his opening statement, defense counsel stated to the jury that the claim that the alleged assault had caused a renewal of Mr. Putney’s atrial fibrillation was “manufactured” by Mr. Putney’s lawyer. Specifically he commented as follows:
What happens here is the plaintiff goes to the emergency room and makes complaint of a foot bruise or back bruise. And then he consults with a lawyer and, together, Mr. Putney and his lawyer, are manufacturing a claim. We don’t want to sue simply on a bruised foot, so now they add a claim for aggravation of his heart condition which this man has suffered since 1986. This claim is a manufactured claim by his lawyer.
¶8At that point, plaintiffs counsel objected, the objection was sustained, and the jury was instructed to disregard the remarks.
¶9In his closing argument, defense counsel argued that the plaintiff was motivated by greed:
He [plaintiffs counsel] asked for motives. What motive would a 63-year-old grandfather have? I don’t know. What are some possible motives? Greed. This case is about money. He wants you to award him money because he claims my client did not act properly. He claims that my client assaulted him.
¶10After emphasizing to the jury that Mr. Putney did not complain of any chest pain, shortness of breath, irregular heartbeat, or other symptom that might be evidence of a heart problem when he went to the emer-*905geney room, defense counsel continued his theme that the plaintiff and his attorney had manufactured the connection between the alleged assault and the plaintiffs atrial fibrillation. He argued as follows:
That’s the end of this story. That’s the end of this case until Mr. Putney hires a lawyer ... Let’s think about this. Dr. Pennock wants to offer an opinion that this incident caused the aggravation of the atrial fibrillation and he doesn’t even look at the emergency room records on the day of the incident. What he did do before that is talk to [plaintiffs counsel].
¶11No objection was made, but at the conclusion of defense counsel’s closing the Court sua sponte instructed the jury that these comments by defense counsel were improper and should be disregarded.
¶12STANDARD OF REVIEW
¶13The Supreme Court has held that “[a]ny effort to mislead the jury or appeal to its bias or prejudice is inappropriate.”
¶14DISCUSSION
¶15Defense counsel stated to the jury that the plaintiffs attorney had “manufactured” the plaintiffs claim. His comments are nothing less than a direct accusation that the plaintiffs attorney, the plaintiff, and, by implication, Dr. Pennock, fabricated the causal connection between the January 8, 1997 incident and the new onset of atrial fibrillation, and then committed a fraud upon the Court and the jury by presenting that allegation at trial.
¶16In his response to the plaintiffs’ motion for a new trial, defense counsel makes no attempt to back away from his comments. He contends that his comments were entirely proper and supported by the evidence. He contends that his assertion that “Mr. Putney and his lawyer manufactured a claim after the fact”
¶17Defense counsel’s contentions must be rejected. They have no merit. His “manufactured” claim argument is not supported by the record at all. Less than three weeks after the January 8 incident, the plaintiffs doctors diagnosed a new onset of atrial fibrillation. The condition had been asymptomatic for three years. The mere fact that a direct causal link between *906an event and an injury may not be expressly documented in medical records in so many words, or that there may be some delay between an event and a symptom, creates no inference that a claim is made in bad faith. Such circumstances are a normal subject of litigation. In addition, there is nothing unusual about a plaintiffs lawyer discussing the plaintiffs claim with a treating physician. Plaintiffs counsel must be able to do so in order to evaluate and prepare the plaintiffs case, and must be able to do so without fear of being subjected to unwarranted accusations of witness tampering. Nothing in this record even remotely supports defense counsel’s argument.
¶18Like most comments that are not supported by the evidence, the ones made here tended to suggest to the jurors that defense counsel was privy to some relevant information which was not included in the evidence being presented to them. Defense counsel’s comments, however, go far beyond that. They were highly inflammatory and were clearly meant to mislead the jury and unfairly prejudice the jury against the plaintiff and his attorney. The charge that a plaintiffs claim is “manufactured” is calculated to prejudice the plaintiffs attorney, and by association, the plaintiff himself, by playing on well known negative aspects of the public’s perception of the legal profession. In addition, an unjustified attack on the integrity of opposing counsel at trial is a violation of the Rules of Professional Conduct.
¶19A new trial should be granted if improper comments prejudicially affect substantial rights of the plaintiff. Fortunately, improper comments in the form of personal attacks on opposing counsel’s integrity are not something that this Court is required to evaluate often.
¶20The plaintiffs have urged the Court to grant a new trial on damages only. The jury allocated fault between the parties 60-40 in favor of the plaintiff. A partial retrial is permitted where the issue to be retried is clearly severable from other issues, and no injustice will result.
¶21Therefore, the plaintiffs’ motion for a new trial is granted.
¶22IT IS SO ORDERED.
¶23. Hereafter, where plaintiff is used in the singular, it refers to Mr. Putney.
¶24. Since a new trial is being ordered because of defense counsel’s comments in his opening and closing, it is not necessary to address plaintiffs’ contention that the verdict is against the weight of the evidence.
¶25. The entire entry reads as follows: "Consultation with ... lawyer for Mr. Putney, was performed by phone for about six minutes duration on 02/02/00. A discussion was held concerning the patient's atrial fibrillation and whether though (sic) medical reasonable probability he could have had an episode of atrial fibrillation precipitated by stress. The answer is yes, and information was related to [the attorney].”
¶26. In fact, when the forelady announced the verdict, she blurted out "the cost of the emergency room.”
¶27. DeAngelis v. Harrison, Del.Supr., 628 A.2d 77, 80 (1993).
¶28. Hughes v. State, Del.Supr., 437 A.2d 559, 571 (1981).
¶30. Defendant’s response to plaintiffs motion for a new trial.
¶32. Rule 3.4: "A lawyer shall not: ... (e) in trial, allude to any matter ... that will not be supported by admissible evidence.”
¶33. Defense counsel’s charge that the plaintiff was motivated by greed was also improper.
¶34. Cases from other jurisdictions which have considered the effect of improper comments of this nature are collected at 96 A.L.R.2d 9.
¶35. Chrysler Corporation v. Quimby, Del.Supr., 144 A.2d 123 (1958).